Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a2b8f78e541d78…

MALICIOUS

PDF

44.4 KB Created: 2020-07-30 04:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2d502c6a4c1e9154430ae3a807668678 SHA-1: 397e34906b17e4da7fc4edb864dc90f3d454ec1b SHA-256: 38a2b8f78e541d78d6401399b509d5c6868dbadc79790b33012f86716120ab81
194 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=basic+computer+skills+pdf`. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=basic+computer+skills+pdf In PDF document text
    • http://files.rgordonbuilt.com/uploads/1/3/1/4/131455463/legitis.pdfIn PDF document text
    • http://files.peaceloveandpregnancy.com/uploads/1/3/1/4/131453121/fererumeveze.pdfIn PDF document text
    • http://files.amandamelissa.co/uploads/1/3/0/8/130874524/dudizoputovovud-gugubifufetebet.pdfIn PDF document text
    • http://files.disneyadventurebook.com/uploads/1/3/1/8/131871852/lebuk.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/1/0437/7870/3521/files/zetunedavabasovularowob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/25617661352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5755/9190/files/29326801871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/48646743072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2574/3515/files/migasuvukox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5377/7047/files/29933984798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3543/4901/files/wugazusoleriberekabux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/vejegubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/7440904194.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7203 5192 bytes
SHA-256: c25ce4fc6776bee61f60cffe522acc402f6533f8d279c2da3d521727c82d6940
font_01_sfnt_off000083ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83AB 9724 bytes
SHA-256: a9eae72953a736e8762a9465444209df0c303da9c4f9dc63f5939ec6617a89a4

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