Malicious PDF — malware analysis report

Static analysis result for SHA-256 86cfa0a4b8a45680…

MALICIOUS

PDF

50.1 KB Created: 2020-08-21 10:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3b215d20847502d7c08b1b7f8a224847 SHA-1: 2fdaf9e6af56fc23cd297463bce461458ce42073 SHA-256: 86cfa0a4b8a456800cbb0eb4adff3c6f7e912f0bf7495b087749177b22e70a18
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to an SEO redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains text related to movie downloads and the malicious URL, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=abcd+malayalam+movie+free++tamilrockers In PDF document text
    • http://gegelido.madagascarfaunaflora.org/uploads/1/3/1/1/131164250/vurususinozu_dorexe_gogukevafadus_jesafatolu.pdfIn PDF document text
    • http://files.psyencholotry.com/uploads/1/3/1/4/131438337/milesa_turiwixamu_suxetesodofoso.pdfIn PDF document text
    • http://files.puggeroomie.com/uploads/1/3/1/4/131407233/995a737.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8640/4000/files/sales_and_marketing_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rixozuxixewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6032/0669/files/90171352489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3582/0185/files/jotifan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/2380/5079/files/root_cause_analysis_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/fumesawelorubejupapede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/75213768813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lejozusuxawunulimedobina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4763/2548/files/gozetegego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0351/6827/files/12284324839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7277/4556/files/grade_10_biology_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5183/5811/files/rejuwidabajav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/mifubitefut.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD5 5524 bytes
SHA-256: 6e6c022ff86d06ce3389bfe92fe27aec7a33d3dc66e22f13dc6887b71b3514e9
font_01_sfnt_off0000828d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828D 10120 bytes
SHA-256: 2aefcc7f80ac79a34334ab9723c2384e6e7c589261637aef4c4c1511c2493c66
font_02_sfnt_off0000a56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA56E 16164 bytes
SHA-256: 4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349