Malicious PDF — malware analysis report

Static analysis result for SHA-256 771a11bc4d29617d…

MALICIOUS

PDF

45.5 KB Created: 2020-08-17 10:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb76cc4ca9a79bfcf93d5d29929a22de SHA-1: 41994e282b877a24523bfd7f5eadad7ef76ac808 SHA-256: 771a11bc4d29617d2d16dd8225c6e15cae979fa3cbce4753487294f5d03cb720
194 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified as 'ttraff.cc'. The document body and embedded link structures suggest a phishing lure, likely attempting to trick users into downloading further malware or visiting malicious sites under the guise of 'free downloads'. The ML classifier strongly supports the malicious verdict.

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=tik+tok+audio+song++online In PDF document text
    • http://files.armstrongchoirs.org/uploads/1/3/0/7/130740211/gepilolomilarakop.pdfIn PDF document text
    • http://files.scalestuff.org/uploads/1/3/1/4/131483371/9846c66b2a2c4.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/1/0436/2534/9283/files/autismo_diagnostico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/fonizedotawupomorovak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/alternator_problems_and_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7539/4977/files/juxekanakilazamiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44219577828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/labour_attendance_card.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/92889996899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7242/9980/files/jajonepovokimidal.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_off000067fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67FB 4912 bytes
SHA-256: 4352e761c190e6924140d95081ea563e8bac2b60c7bdb722b23a78a60388713c
font_01_sfnt_off000078b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B4 2528 bytes
SHA-256: fc4021e369c7333a3e2698b65512cd5ca33aa0a3949f6c925ad90d66ca89f0ce
font_02_sfnt_off000083e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E5 10844 bytes
SHA-256: 3d9823d01688ee657c6ba89d68a0a1dc954ceed5ca64deba2e48067f09449de5

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