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)
MD5: 2f05665c2f7a0b42a663066dc435dd5c SHA-1: cbda214766bb5e352ab21891bc733d69766b017b SHA-256: 81997f448760149c127babe97ed16f16058ae971d431890162d926b07824508b
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector to 'ttraff.ru'. This suggests an attempt to lure users to a malicious site, likely for phishing or malware distribution. The presence of numerous Shopify links, while many are benign, could be part of a link farm to improve SEO for malicious content. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious redirector attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 4

  • 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.
  • 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
    • http://files.donnysinge.com/uploads/1/3/1/8/131871745/7760950.pdf
    • http://files.alexanderjayweissman.com/uploads/1/3/1/3/131381078/raripeninopo.pdf
    • http://foliwiza.trawallaps.vic.edu.au/uploads/1/3/1/4/131438539/5414770.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0808/9499/files/bozutupadesi.pdf
    • https://cdn.shopify.com/s/files/1/0441/1126/5944/files/madonipujotumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/lipid_profile_chart.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/78366559248.pdf
    • https://cdn.shopify.com/s/files/1/0434/3129/7185/files/ibm_dfsort_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6775/2100/files/18535141979.pdf
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/crazy_train_solo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/35148647928.pdf
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/winchester_model_12_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1582/files/51671936661.pdf
    • https://cdn.shopify.com/s/files/1/0435/2288/3735/files/zevunolimutotelozewij.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • https://gitlab.com/smc/meera/blob/master/COPYING

Extracted artifacts 9

Files carved from inside the sample during analysis.

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

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