Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba1c3cb5a74f5ed…

MALICIOUS

PDF

43.8 KB Created: 2020-08-20 20:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a329d1a07f3e30db753271228eb1f54 SHA-1: c208f6f1a88c49108eedf67af2d4676ebbebaab4 SHA-256: 5ba1c3cb5a74f5edf47b63f968faa0d3e898353fe88124f98f8f4909bb3b031f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, many pointing to a redirector service (ttraff.cc) that is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'free kindergarten math worksheets' and the malicious URL, suggesting a phishing or scam lure. The presence of numerous PDF links and a malicious redirector indicates an attempt to drive traffic to potentially harmful content.

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=free+kindergarten+math+worksheets+comparing+numbers In PDF document text
    • http://likal.impact7generations.com/uploads/1/3/1/4/131410227/4509c118.pdfIn PDF document text
    • http://files.medicalequipmentcorp.com/uploads/1/3/1/3/131380756/2898562.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/1/0433/0687/7080/files/xixuvedivikeror.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/29716318269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/52154558511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3444/7770/files/libro_arqueologia_del_saber.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5497/3606/files/gimelizokex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4213/6476/files/canales_de_comunicacion_electronica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/35445509645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8938/5890/files/visual_guide_poker_hands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/18222373224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7362/6524/files/dumunulup.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B94 5708 bytes
SHA-256: 53998c0f70066638cec40bdc57fc96cfe9921c76bb0b8133553d232fa7c3f168
font_01_sfnt_off00007ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE3 10220 bytes
SHA-256: c0ba4c4b4959f3f8903a3164c4f8cb58bd3c5e9a11c2c81209d8aeb84a211b53

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