Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5255ccc5759d461…

MALICIOUS

PDF

54.5 KB Created: 2020-08-18 16:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0c336902cb25b127a6570e5b51df169f SHA-1: 56a9c8e989a281560afe193a568aac3ae4c9999d SHA-256: c5255ccc5759d461966dd2def0ae73387aa3b189879797be73cf4f4103f7c220
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for a playbook, and the primary malicious URL is directly referenced. 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=oregon+spread+offense+playbook+pdf In PDF document text
    • http://files.bathnbloom.com/uploads/1/3/2/7/132740384/fatewaxe.pdfIn PDF document text
    • http://files.mtwcare.org/uploads/1/3/2/6/132681464/sevodurawutit-majujemezamir.pdfIn PDF document text
    • http://files.thyperfectpomsky.com/uploads/1/3/1/4/131407233/wolefufopokib-solotu.pdfIn PDF document text
    • http://files.mastergardeners-rc.org/uploads/1/3/0/9/130969811/2832822.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/1/0429/3191/2857/files/kugep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8445/4817/files/6768798473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1028/3931/files/bacteria_gram_positive_and_negative.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/69629833403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2639/0951/files/gerigadijajinenuval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/memew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/29546431343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4607/6565/files/wufevudalor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0464/9884/files/67104619915.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_off00008b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7C 5540 bytes
SHA-256: 1a5984fbc93433a107afc8e915fbc0e2d2e93acd0c681c91bbcf99946e56b3e2
font_01_sfnt_off00009e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E68 15020 bytes
SHA-256: 355700f0bc46eebf0da48a8cf7c412efcffd072ae17b44dd4295e46a1313ee17

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