Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0241ec075282086…

MALICIOUS

PDF

55.4 KB Created: 2020-07-31 10:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: db67e0497e8851972411cf5059cfb6f5 SHA-1: 3085678dab82ee116fe15ff88fef22295b8d95e5 SHA-256: b0241ec075282086f69a45d9e4145302ccda4bf56835a7e8e1bb2c36d049b3df
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'book pdf' and the authoring application 'wkhtmltopdf', suggesting a lure. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a phishing or malware distribution site.

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=against+the+grain+book+pdf In PDF document text
    • http://files.cake-angels.co.uk/uploads/1/3/0/9/130969897/b7d2878f2680e.pdfIn PDF document text
    • http://files.ccsb.danafarberdev.org/uploads/1/3/1/4/131437249/6374087.pdfIn PDF document text
    • http://files.musicgifts4u.com/uploads/1/3/2/7/132712326/2ca946.pdfIn PDF document text
    • http://files.tivolimarsh.com/uploads/1/3/1/4/131406258/923f6470cdc6.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/1/0430/3316/5986/files/noxenumufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/52503134348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4294/4677/files/18429324950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39748763391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/12330802147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/newafigekezapewewonirodev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mozinetesabelenigifil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/lilagejejilowerokejip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/suvaxadoxolajala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4280/6680/files/54682419956.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 7

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_off00009a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A28 5252 bytes
SHA-256: ccaf601c0cd78bfc377d7233dcdc525c8b7ac0202b27c752737f865f919ac33e
font_01_sfnt_off0000abf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABF0 10704 bytes
SHA-256: 345f0af261c52c5ca913547b3afc108b5562685486fd84af9dc3c4c001fd3e1f

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