Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b54f4fe84c1153…

MALICIOUS

PDF

44.2 KB Created: 2020-08-07 09:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f73be829c6e5f83c895689d68742ee12 SHA-1: 9320285f531045bec822aef0927f7b81eb914fd9 SHA-256: 40b54f4fe84c1153f875d9a8987cdefa20d9ec0d6f11662483ceb4e736774e76
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic. The presence of numerous embedded URLs, many pointing to Shopify, suggests a link farm designed to obscure the ultimate destination. The primary malicious IOC is the redirector URL, which likely serves as a gateway to a phishing or malware delivery page.

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/pify?keyword=cefalea+hemicranea+paroxistica+pdf In PDF document text
    • http://files.rochesterphoenixmartialarts.com/uploads/1/3/1/4/131453354/77ee6.pdfIn PDF document text
    • http://lesopiv.relationaltransformation.org/uploads/1/3/2/6/132681556/dcdee4.pdfIn PDF document text
    • http://files.aboutta2s.com/uploads/1/3/1/3/131380183/7207864.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/1/0431/2127/9138/files/32000939063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1179/3315/files/nomatirodevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/bopapexokaduken.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78578063821.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6906/3836/files/15945682939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/lugojodujibes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0691/0887/files/dotebuvamapaxebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/40500002184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/7608828522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/lilofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8103/1061/files/dovopoxomunukizuvuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5300/6494/files/jamar.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 4

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_off00006ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF6 5368 bytes
SHA-256: 282b0ec191d7ff8dfc7e623c9da4b96a4236c7cc63ae6850297ee9a4d26338cc
font_01_sfnt_off0000820d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x820D 9992 bytes
SHA-256: bc99892ad0e1e3c1e3a34824a718a1085a7124792d5a318ec99a8a18d433106f

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