Malicious PDF — malware analysis report

Static analysis result for SHA-256 a685c4275ec1ba57…

MALICIOUS

PDF

71.7 KB Created: 2020-08-16 20:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a809479528fe54a384445ff73603123 SHA-1: fce8ad1c939aebfa9b3807c172b734cee28b88de SHA-256: a685c4275ec1ba57b2aac88a7a166d4c075a13d0075e11b5c9b2d8ff40cdfc66
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a link farm, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=coliform+testing+in+milk', which is flagged as malicious. The presence of numerous links to Shopify domains, many of which are confirmed benign, suggests an attempt to blend malicious links with legitimate ones. No scripts were extracted from this sample.

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=coliform+testing+in+milk In PDF document text
    • http://files.tillerridge.com/uploads/1/3/0/9/130969085/cd2e6e.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/1/0430/1117/8649/files/pisilax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/tenemodadulobivek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/agneau_de_dieu_pain_partag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6700/7386/files/nitum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/gexukaluruxenilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2530/9604/files/43195254941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8575/8618/files/adobe_master_collection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/gilakijifaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0751/5558/files/57239296614.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 2

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_off0000c551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC551 4752 bytes
SHA-256: 99bc7c676fc4b932426064e48ae3bb681c59dcf34a8c9b58ae19cc3b930a66ef
font_01_sfnt_off0000d55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55D 14896 bytes
SHA-256: 176a83a3ee69874436fb09a3eb4bef1b2e80dfef1a4655a5222f00e59316c1be
font_02_sfnt_off000103ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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