Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e63340ee1d8805…

MALICIOUS

PDF

46.1 KB Created: 2020-08-03 12:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d12b9ab0b3fcb674277f20c6992f8816 SHA-1: 73389bd3e97da3840a5d30edac69d0ebec0aa9ab SHA-256: b1e63340ee1d88059f55fa6952e944a293de50a3de0d1d1ab596d130bb717ec0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and redirects to known malicious infrastructure, indicating a phishing or scam attempt. The document body itself contains a URL that points to a redirector, which is a common tactic for SEO poisoning and free download lures. The ML classifier also 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.ru/pify?keyword=algorithmic+and+computer+methods+for+three+manifolds+pdf In PDF document text
    • http://files.flytyingforcescustomtiedflies.com/uploads/1/3/0/7/130776220/92769a87.pdfIn PDF document text
    • http://files.duncanleighclassicalguitar.co.uk/uploads/1/3/2/6/132683017/dajewovidagisi.pdfIn PDF document text
    • http://files.thanksforeverything.shop/uploads/1/3/0/9/130968950/zemof-ribip-tofividek-mipuvejoguta.pdfIn PDF document text
    • http://files.egyptiangift179.com/uploads/1/3/0/8/130874110/kirevu_potakapa_wokozogo.pdfIn PDF document text
    • http://files.holyspiritfarmhorsesanctuary.com/uploads/1/3/1/4/131437474/rasopegit-vefisudosude.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/1/0438/9090/1144/files/linked_list_c_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/sugaxilabaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8370/1155/files/41080066371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6595/6759/files/chst_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/rekeseto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1637/1867/files/89672341584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89573664631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fikikotiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/wukalifujidebowifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4285/6345/files/dnd_3._5e_player_s_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3345/1944/files/16953720670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/gopinomozijurusiwobug.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CE8 13008 bytes
SHA-256: d41c3458f1a94b204056e525ca483373ff6018abd4bc6867e752496dc80242c5
font_01_sfnt_off000076d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D2 5556 bytes
SHA-256: 09ef4f9112815a3f55c565a7dc04c831942d5ca5cbae63b6db5552c96650ef3d
font_02_sfnt_off0000898f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898F 9884 bytes
SHA-256: 99455fcc6edeaad37cd6c9d33cc28855ff909cb7afb58ebc47b5b43b20574381

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