Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f59ab864167628…

MALICIOUS

PDF

41.0 KB Created: 2020-08-24 00:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f51fdc7d70f363dd4ac137e783398624 SHA-1: 2b9d272812c6835c61ef43a29f85983c5c24b064 SHA-256: 85f59ab864167628850b6dbd30544c673ba7099f6ac5edebb0ff894c0372639b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a primary redirector pointing to a malicious URL disguised as a free download for 'low back pain sciatica exercises pdf'. This indicates a phishing or scam attempt leveraging SEO tactics to attract victims. The presence of numerous links, including to Shopify, suggests an attempt to blend malicious content with legitimate-looking resources.

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.com/pify?keyword=low+back+pain+sciatica+exercises+pdf In PDF document text
    • http://files.carperfamilyband.com/uploads/1/3/1/0/131070072/0412b202a0.pdfIn PDF document text
    • http://files.jason-fritz.com/uploads/1/3/0/7/130739059/silenuger.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/1/0434/8759/2608/files/sources_of_bias_in_research.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9559/5938/files/fadisaron.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/git_setup_proxy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3467/3305/files/billie_s_bounce_guitar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/stratigraphic_paleontology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4947/6518/files/6389993887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/89446906918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/dejixane.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_off000062bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BD 5420 bytes
SHA-256: 39aff7d2011b10508638d8c42638cb0d2f621ed1c15b1cd906ed9ff2d100aaed
font_01_sfnt_off0000754e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754E 10120 bytes
SHA-256: de0c3cd8fc978f67ae7812561f28a0403b9638da3772940d0570ae341582250e

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