Malicious PDF — malware analysis report

Static analysis result for SHA-256 811f5e5650ccbb09…

MALICIOUS

PDF

43.0 KB Created: 2020-08-15 23:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 623c1b3be55db7729a6ebd8e9fda2315 SHA-1: a41f9430388012dc532ca142673fe6972bdd4059 SHA-256: 811f5e5650ccbb0996b98d1acb2e07e09dabf17565cdfc64915bb39f30f6bb1b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious infrastructure, disguised as a vehicle owner's manual. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a link farm designed to obscure the ultimate malicious destination. The ML classifier strongly indicated maliciousness.

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/wb?keyword=manual%20del%20propietario%20nissan%20tiida%202008 In PDF document text
    • http://files.bristolhairdressing.com/uploads/1/3/1/8/131857334/51f1e7e184bd73.pdfIn PDF document text
    • http://files.lynnecrookespepper.com/uploads/1/3/1/4/131410009/1894536.pdfIn PDF document text
    • http://files.puldinauto.com/uploads/1/3/0/7/130775171/depimob-kuxenafobix.pdfIn PDF document text
    • http://ranowob.nishatrades.com/uploads/1/3/1/4/131483281/416261915fdc3.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/1/0434/1386/4615/files/jevumepig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2588/9442/files/49122395481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/5634/4737/files/high_eyes_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9401/6157/files/kodatiboxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6657/2441/files/pokemon_blue_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6288/6554/files/wifulutekegan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/mewikerimogaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1594/6918/files/ceo_andhra_pradesh_voter_list_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/sipewanefebunimisefu.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_off000067d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D8 5424 bytes
SHA-256: d6826802779052229281e5ae8d70e8bf290fa09a50ca0629b2932d8016021caf
font_01_sfnt_off00007a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A54 10752 bytes
SHA-256: ce2569f936d849b1550aa9b6a38a3034dbdf5bc48088e250ec8e2f7ff0c13b5b

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