Malicious PDF — malware analysis report

Static analysis result for SHA-256 c831e7a6eaf71425…

MALICIOUS

PDF

47.9 KB Created: 2020-08-23 22:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bae93b6463615b4e58f7972ef07c218d SHA-1: af3b1a8df271e1abde1fd4fb08d89517bde394f8 SHA-256: c831e7a6eaf71425461982a232e6807a39e718b03afd6c58d2fac4199ae708fa
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to ttraff.com, which in turn hosts a large number of PDF files, likely as part of a link farm or SEO abuse tactic. The document body, though heavily obfuscated, contains the same URL and references urgency, suggesting a lure to encourage clicking the link. The primary malicious activity observed is the redirection to potentially harmful or unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=antidotes+list+pdf In PDF document text
    • http://semun.gasparatos-lab.org/uploads/1/3/0/7/130740178/pukewaximipaw.pdfIn PDF document text
    • http://files.robbieleespencer.com/uploads/1/3/2/8/132815343/3c86e26be9191d1.pdfIn PDF document text
    • http://files.cbsamet.com/uploads/1/3/1/4/131483053/sirere.pdfIn PDF document text
    • http://files.urbba.com/uploads/1/3/1/3/131384436/wuvazuduzin_fisitaliv_risadofixilir_jarazazeki.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/1/0427/3651/7286/files/vufajowobizirupuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7986/8309/files/zetenemexizepumafejotix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9023/1974/files/39186920559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0506/6907/files/fafuwup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/morfologi_aspergillus_niger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/7099/6889/files/cg_song_hd_video_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1868/1496/files/adpcm_file_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/2448856408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1605/2123/files/b._el._ed_syllabus_mjpru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0155/1771/files/wiwutulenum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/46248769094.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 4

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_off00007684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7684 4716 bytes
SHA-256: ed24ccba6f4e6e1ed371cb72a5af99f57fe2ef2552bb0d2d5716c10a4ef5d024
font_01_sfnt_off000086a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A3 14208 bytes
SHA-256: 6d41aff254918619e789ced1b2c3714bcd776f1c56e6ded2e527be79ddb8f7ce

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