Malicious PDF — malware analysis report

Static analysis result for SHA-256 981a29d7442539a7…

MALICIOUS

PDF

38.3 KB Created: 2020-08-18 20:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 74f706600211fd9ec2baedc5f2c78a6c SHA-1: e3b0d75729d0bb50bb34dcab12c4544d5c59166e SHA-256: 981a29d7442539a7d065d7f9a9e11f932c2ed86502b0a77a05cf6f1119078aa3
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search results for educational materials, with the primary link redirecting through ttraff.com. This suggests a social engineering tactic to trick users into clicking malicious links. The document body, though heavily obfuscated, contains the target URL and other embedded URLs, reinforcing the link-farming and redirection attack pattern.

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.com/pify?keyword=holt+mcdougal+us+history+textbook+answers In PDF document text
    • http://files.togetherforthelongrun.org/uploads/1/3/0/7/130775231/dijubovu.pdfIn PDF document text
    • http://xoluk.osmacappella.com/uploads/1/3/1/4/131408061/gofoj_kafekoxiwenedas_fesaperadozo.pdfIn PDF document text
    • http://files.abetteryou7.com/uploads/1/3/2/6/132681264/6040056.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/1/0432/5546/4104/files/18729122756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/13207998519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4487/2090/files/favimawuvuziziw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/5928627834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4354/3447/files/25458221326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8867/4967/files/884266469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8981/1861/files/hud_balance_sheet_account_numbers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6337/7048/files/85449687387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2946/2165/files/cypher_system_rulebook_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/10364264089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/61131082743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9186/1412/files/xudiwulumosowawepuxow.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 3

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_off00004b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B70 5780 bytes
SHA-256: 814fb6a7e2c71e6bcdd7316620e6ea76ebcd169a5f9563e69ca198406b7bc07b
font_01_sfnt_off00005f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0B 13772 bytes
SHA-256: 77fbdf2aa403b7d5c591133b1dfbc8f69c66635454d2c68038716624018248af

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