Malicious PDF — malware analysis report

Static analysis result for SHA-256 447181dd257f1682…

MALICIOUS

PDF

38.7 KB Created: 2020-08-16 12:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1425da8d9e113a1a19e6a6ca3c5e53a9 SHA-1: 9f8db4b612bb6961c23cc9dab652c236bee83229 SHA-256: 447181dd257f16824b21274e0098dae6844d8603d5692ea9f293b48adf6506ea
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a BCBS Michigan outpatient prior authorization form, threatening account termination if action is not taken. The document also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm for SEO poisoning or traffic redirection. The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack.

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.cc/pify?keyword=bcbs+michigan+outpatient+prior+authorization+form In PDF document text
    • http://files.lizleyden.com/uploads/1/3/0/8/130813965/dedopefiv.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/1/0435/3989/0327/files/barupabobupuwubarawusarug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/69069376082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1021/9432/files/biochemical_tests_for_identification_of_medical_bacteria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0918/7750/files/xikawozedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5262/0193/files/ssc_gd_answer_key_sarkari_result_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3886/6593/files/arduino_lcd_projects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8150/4670/files/44167761418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/0319/6070/files/brche_addieren_subtrahieren_multiplizieren_dividieren.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0515/5224/files/13576087609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3077/2902/files/46311225343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/pejurudubiden.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bugos.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 5

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_off000057ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57AE 5636 bytes
SHA-256: 1dea0c71d0e0797e4cf3e04d23d11b8d18cf85a6b3dee87c58f6604afdbf3f12
font_01_sfnt_off00006ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB6 10316 bytes
SHA-256: bdcc9542da74793d0557b404b4bed05cd3a1613a6ac496cec69bcd3f6ddc26d5

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