Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc5d11b61dabf75…

MALICIOUS

PDF

36.7 KB Created: 2020-08-12 23:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c1b6a9ad7146b895eabe64f9440fd7c6 SHA-1: 2a2749ca0b9092577e12ce28d5fc643c7e2fcae6 SHA-256: 8fc5d11b61dabf753d95bca85a0248e47555c13df712d9c1fa491377372017ad
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to distribute malicious content. One of the primary links, 'https://ttraff.com/pify?keyword=the+biology+of+osmosis+jones+questions+answer+key+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the link farm behavior is sufficient to classify this as a malicious document.

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=the+biology+of+osmosis+jones+questions+answer+key+pdf In PDF document text
    • http://files.clipture.net/uploads/1/3/0/9/130969543/7a971979da11.pdfIn PDF document text
    • http://files.stfeichinsns.com/uploads/1/3/2/7/132741194/piginugulomokozugo.pdfIn PDF document text
    • http://pawafabud.rimonim-liturgy.org/uploads/1/3/0/7/130738511/lowodefiwol.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/1/0431/1715/0368/files/15951410295.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/9786446093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0109/3030/files/91010948928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8692/0347/files/35758498469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7612/2779/files/41758213386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/denukudovujaburamiwawonus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/zifukixavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3423/0429/files/69127426547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/vascular_anastomosis_technique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5511/9512/files/xesokelonipikitaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/26324614998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0775/2866/files/tkinter_python_3.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_off0000503d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x503D 6004 bytes
SHA-256: 36267998e6a425bf776a2048f058b525dd25080757bf238dd54f0f44c82ddc1f
font_01_sfnt_off00006499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6499 9800 bytes
SHA-256: 763ff192f2eb188589c9211bff765ca25584eb3220b2a11c9c4ad8f05ad8a18a

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