Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a98763a13ce560…

MALICIOUS

PDF

39.1 KB Created: 2020-08-10 22:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 976cced2b12677f0d529d2d849125259 SHA-1: c25892eb2a63a2a9adbac2abdb560e2ba092b70d SHA-256: 39a98763a13ce560729a408dba7118814016523a81913f417a6799b9ee4e8bc0
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains references to URLs that are likely part of a link farm or SEO manipulation scheme. The primary malicious URL identified is 'https://ttraff.com/wb?keyword=simulation%20argument%20pdf'. The presence of numerous external PDF links, many hosted on Shopify, suggests an attempt to distribute content or traffic through a seemingly legitimate platform while masking malicious intent.

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/wb?keyword=simulation%20argument%20pdf In PDF document text
    • http://files.destinationhop.com/uploads/1/3/0/9/130969334/vufot.pdfIn PDF document text
    • http://files.samanthajade.co.uk/uploads/1/3/0/8/130873820/noxabalutuli.pdfIn PDF document text
    • http://files.godsetmeup.com/uploads/1/3/0/7/130776828/rewunitozuwusilusoj.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/1/0435/6141/8913/files/46621515392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0184/7708/files/herblore_calc_rs3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8504/2598/files/human_body_systems_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5071/0693/files/nidazavotebukonowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0300/1502/files/31102375780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/data_store_roblox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/84240254289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6596/6741/files/marupijekizavugipid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6997/1363/files/neoclassical_literature_authors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/508957232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/vejobumogunatobikibusat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0981/8272/files/29884728324.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_off00005d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D58 5288 bytes
SHA-256: d5eca23e9f11b8ee0b818b5692f2ee3866febc7ff634d90da4f5a74e50fea7e1
font_01_sfnt_off00006f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F33 9556 bytes
SHA-256: 30c3ba540e32ffdf314fad076eeb01af80d8abc7b8f1454b5485875302cace3d

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