Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf87468c037fcd1…

MALICIOUS

PDF

42.0 KB Created: 2020-08-19 18:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f4b169bea3ab2a265b94e60260f44b37 SHA-1: ab39deac1a733db9a35df0a6d01c8f87ad9d8725 SHA-256: 8cf87468c037fcd1708b8256aaafa72507ec1ebabd310b73171689c53f3c0f45
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, a technique often used for SEO poisoning. One critical heuristic identified a link to a known malicious redirector infrastructure at ttraff.com. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector, suggesting the document's primary purpose is to drive traffic to malicious sites.

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=green+bay+packers+injury+report+2019 In PDF document text
    • http://tunowufil.toencourageyougreetings.com/uploads/1/3/0/9/130969204/04ffacd333a9.pdfIn PDF document text
    • http://files.theprestigemaids.com/uploads/1/3/1/6/131607565/poputefig_xirivefejogalip_topijupop_ligixifasexati.pdfIn PDF document text
    • http://files.inthegarageonline.com/uploads/1/3/1/4/131411762/eeb058f6.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/1/0430/3467/3305/files/biliary_atresia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/talipexorupopitutijidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0147/8300/files/badenenujirutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/gedivosumojanojepiwov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7754/1792/files/fanedebavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3050/3846/files/75417485886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/understanding_psychology_mcgraw_hill.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8746/2551/files/xupadulesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/sekol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/tupigogidifileguruw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/vafizadozamepaxuvobazituv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/botw_update_cemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7618/9346/files/98045787936.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 6

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_off00006594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6594 5788 bytes
SHA-256: 031b37de5fe442f8b3c2b895f5b32e6cc304af8e440e7d694571b88b4ee34f78
font_01_sfnt_off0000796a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796A 9796 bytes
SHA-256: efa412bd182f7245ef2ba58d037dc7707c075041620573ef64bd7c2374a77de3

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