Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9180366febf8c1b…

MALICIOUS

PDF

41.3 KB Created: 2020-08-18 21:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 870d4c8d52d15a23eddc556fe9d20338 SHA-1: 67924419493ded30cf51267bd3e65a417e5c194d SHA-256: b9180366febf8c1b1d63592f9515762034c9e00c785907ebe886bbe2fa12be44
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to a 'stock ageing report format'. The presence of a link farm and a malicious redirector indicates an attempt to lead the user to a compromised or malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=stock+ageing+report+format In PDF document text
    • http://files.bucco.fi/uploads/1/3/1/8/131856330/netuxilanir_radipoj_ruruxezogibe_fesapewi.pdfIn PDF document text
    • http://files.constantinpreda.co.uk/uploads/1/3/0/7/130775197/farimemebom.pdfIn PDF document text
    • http://ledupavax.rhymebaby.com/uploads/1/3/2/8/132814930/3c68c4043a.pdfIn PDF document text
    • http://sugaz.ulittlepunk.com/uploads/1/3/1/3/131380594/d2a73e3a4dccb.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/1/0436/1335/6194/files/audyt_bezpieczestwa_informatycznego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0742/6216/files/lanoganazaribepajonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/dnd_5e_creature_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9578/4600/files/tekizuvojosubamozej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/42052138179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2812/7645/files/kuzow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8844/5591/files/4890484546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6232/1567/files/aulas_de_ingles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/eft_best_ammo.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_off00005f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9D 5292 bytes
SHA-256: b6a88a53760e866704f6a6588191d05b42d64126f14d489f8276df41df139c51
font_01_sfnt_off00007187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7187 11812 bytes
SHA-256: 91c524ae497b85325406df87e6bc2f8ee437ad12fa94b68ebf13dbfa5222a612

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