Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c49891ad32c8d8d…

MALICIOUS

PDF

55.6 KB Created: 2020-08-21 00:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 73b0455e7f10594d2edd9142b4a84eed SHA-1: 5ebdc362c7c64476d2e6487d24674c9cac73da7a SHA-256: 8c49891ad32c8d8d5bfce71bab05a321ed88198e4e920d2525613cf7c9dfca71
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a mass of external links, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Princeton review sat manual answers' and the malicious URL. This suggests a lure to trick users into clicking the link, likely leading to further malicious content or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=princeton+review+sat+manual+answers In PDF document text
    • http://files.mrsbirdsmusicpage.com/uploads/1/3/0/8/130814644/mirovokirofawun.pdfIn PDF document text
    • http://files.gamecockcop.com/uploads/1/3/0/8/130874513/sotifajama-duvidizelu-vuroju.pdfIn PDF document text
    • http://files.joshforil91.com/uploads/1/3/1/3/131378868/6121353.pdfIn PDF document text
    • http://files.portageresourceguide.com/uploads/1/3/1/6/131606644/8719065.pdfIn PDF document text
    • http://sixidoxo.lisastory.org/uploads/1/3/2/6/132682347/lubutupozadodisitu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/zuses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/calaverada_gipsy_kings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4778/8450/files/libumavedatimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0003/5490/files/16738569273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8596/9046/files/past_tense_worksheets_for_grade_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3114/8197/files/cbse_nic_in_2020_class_10_sample_papers_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/all_in_one_piano_scales_chords_arpeggios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/rupitebevom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9887/3763/files/43142146054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/alergia_por_picadura_de_insectos_tratamiento.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87BE 4980 bytes
SHA-256: bfaef68293909f94fc903afb1b01122172e6e99d13dfb7206eeceeaaab00d229
font_01_sfnt_off00009894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9894 13304 bytes
SHA-256: 551bb4f2f65e24fbd8671bde47232f8c5d2b7fb0aa4f0be00cc00aed2c5360e7
font_02_sfnt_off0000c39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC39F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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