Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4989a95926421b1…

MALICIOUS

PDF

50.3 KB Created: 2020-08-05 08:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e8840285863bb7950a6f61544d74d85 SHA-1: ea17b8b07b71dd8c07243a6fb6b6aa1b6d30a435 SHA-256: e4989a95926421b1bdd640ec96ff24eac9c493fcbf0e0ac0bd0e0cfacf998294
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to external PDFs, a common SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=africa+in+world+history+textbook+pdf'. The document body, though heavily obfuscated, contains references to the wkhtmltopdf tool and a date, suggesting it was programmatically generated. The presence of multiple PDF links and the redirector strongly indicate a malicious intent to drive traffic to harmful sites.

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=africa+in+world+history+textbook+pdf In PDF document text
    • http://files.bettylum.com/uploads/1/3/1/4/131452815/1254587.pdfIn PDF document text
    • http://files.robinrgriffith.com/uploads/1/3/1/6/131606252/votiridalototi-zixav-wifapisunupupok.pdfIn PDF document text
    • http://files.bravemansuitingco.com/uploads/1/3/2/7/132740327/6158b5d2ccc964d.pdfIn PDF document text
    • http://files.pinewoodsaudubon.com/uploads/1/3/2/3/132302768/dc31e5827b6ee79.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/1/0438/7930/1288/files/alphabetical_list_of_countries.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/najakaminafazazawolalaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0994/1415/files/66701802330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/fotutokavanedokawuton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tiwimuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6354/1917/files/abdul_kalam_essay_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/45450325551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/54314857303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/68270733080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4597/6224/files/jomerid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/22110072475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/a_pocket_style_manual_diana_hacker.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 5

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_off000085d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D6 5700 bytes
SHA-256: 44fbb85665787c9dd5b09a6580b73e459983768c62b7050a8aaa21ecd4b5d5f8
font_01_sfnt_off00009949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9949 10168 bytes
SHA-256: 180a7b564fde194396b6da5764e9522ab5c8699ba3fbd768bf00b97e59a85e46

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