Malicious PDF — malware analysis report

Static analysis result for SHA-256 81997f448760149c…

MALICIOUS

PDF

74.2 KB Created: 2020-08-06 23:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f05665c2f7a0b42a663066dc435dd5c SHA-1: cbda214766bb5e352ab21891bc733d69766b017b SHA-256: 81997f448760149c127babe97ed16f16058ae971d431890162d926b07824508b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with a critical heuristic identifying a link to a known malicious redirector (ttraff.ru). This redirector is likely used to obscure the final malicious destination, potentially for phishing or malware delivery. The document body, though heavily obfuscated, also contains the malicious URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=rig+veda+upakarma+pdf In PDF document text
    • http://files.donnysinge.com/uploads/1/3/1/8/131871745/7760950.pdfIn PDF document text
    • http://files.alexanderjayweissman.com/uploads/1/3/1/3/131381078/raripeninopo.pdfIn PDF document text
    • http://foliwiza.trawallaps.vic.edu.au/uploads/1/3/1/4/131438539/5414770.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0808/9499/files/bozutupadesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1126/5944/files/madonipujotumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/lipid_profile_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/78366559248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3129/7185/files/ibm_dfsort_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6775/2100/files/18535141979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/crazy_train_solo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/35148647928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/winchester_model_12_manuals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5271/1582/files/51671936661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2288/3735/files/zevunolimutotelozewij.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a3ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA3EF 4004 bytes
SHA-256: 36b4b5d991dcb390e056839a2df894f071e33ec3893ff7c70ad5c19a43162cb6
font_00_sfnt_off000077ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77AD 4868 bytes
SHA-256: 8f6f2199adfcc06f73906baf78cdee3a7857fbbdd32c5b424e5f28941a23a481
font_01_sfnt_off00008844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8844 3936 bytes
SHA-256: 909e96cd9c04cae1d88947d74157bb65c56f09e1a5359e8f5fc40084479bf184
font_02_sfnt_off00009629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9629 3600 bytes
SHA-256: 0775d2744d377e58e699bed971bf2116f22092fea9670d29f233da289140d547
font_04_sfnt_off0000b2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E3 3720 bytes
SHA-256: f70a4487342760fa3bc28bad1100546c4afaea71a4f601112f408da3928d6fd2
font_05_sfnt_off0000c193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC193 16492 bytes
SHA-256: 63fb96755514855c0d4f46f1d98853bca6edb69c4d4fa32b0913ae52deb05ea0
font_06_sfnt_off0000f229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF229 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
font_07_sfnt_off00010029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10029 2900 bytes
SHA-256: 952398e7d7617af7424780b1a4945f55deabf00c0a9bbc0980797c9f7e0b3970
font_08_sfnt_off00010be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE5 3140 bytes
SHA-256: 25999c497b2e46e11fdb647fbc95fa054aaacc73adb4bc6dcae6b9e78512ebf9

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