Malicious PDF — malware analysis report

Static analysis result for SHA-256 681cf38df5de1c61…

MALICIOUS

PDF

44.1 KB Created: 2020-08-01 06:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 30b347f317dae601cb68db69cdecfc7f SHA-1: a19385194ac55c060ae0f9cb30badc0debc062fa SHA-256: 681cf38df5de1c610603574323b3c352db8d648ac756fe34a9784822593dfb79
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and contains multiple heuristics indicating malicious redirector links. The document body, though heavily obfuscated, contains URLs that point to a known malicious redirector, ttraff.cc, which likely serves as a gateway to further malicious content or phishing pages. The presence of numerous links to external PDFs, many hosted on Shopify, suggests an attempt to obscure the ultimate destination and potentially engage in SEO manipulation for malicious purposes.

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=ti+rubberband+man In PDF document text
    • http://files.doberunkennel.com/uploads/1/3/0/7/130739348/6635297.pdfIn PDF document text
    • http://files.mainstreetenid.org/uploads/1/3/0/7/130776611/zokewelizot.pdfIn PDF document text
    • http://files.gbpsu.org/uploads/1/3/0/8/130874474/siralabojo-novijodutu.pdfIn PDF document text
    • http://files.crmoawareness5k.org/uploads/1/3/0/7/130739987/33912.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9963/4328/files/piwojisujitudaxogon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/tuzedavebune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/suturezalajowusuvogedalim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2724/2903/files/nolemewetulopomudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/rifilalafufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/11234057763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/21432267893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/52213819945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/jevijaboba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/zelefakobani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9275/5103/files/wukesaxo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58B0 4544 bytes
SHA-256: b1a6e3e0b9a012273eb77c460a2636167e14b0af22f21926cd515aeec422f364
font_01_sfnt_off000067e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E2 14760 bytes
SHA-256: 765fd55f0ffdac802cb6459407cc55ce86001837cf87b29907499be9c9fe5cd5
font_02_sfnt_off000095b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95B4 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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