Malicious PDF — malware analysis report

Static analysis result for SHA-256 a04d162a1a97f8ea…

MALICIOUS

PDF

46.3 KB Created: 2020-08-05 06:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d9d733e04305df46e453ee6d4613153d SHA-1: a4d323e3a3c8ae54bf2a629ae90c042567080254 SHA-256: a04d162a1a97f8ea30ad8911c5e939ab3945dcdeaf9cd57575cc84f50df14399
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as a mushroom identification guide, but the primary link redirects to a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body is heavily obfuscated and contains embedded URLs that are part of the link farm. The presence of numerous external PDF links suggests a SEO poisoning or link farm attack pattern.

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=edible+mushroom+identification+guide+pdf In PDF document text
    • http://files.lakeriley.org/uploads/1/3/0/8/130874197/180912.pdfIn PDF document text
    • http://files.mindykannon.com/uploads/1/3/1/8/131872021/1367894.pdfIn PDF document text
    • http://files.sandpipermag.com/uploads/1/3/1/4/131437976/juxofiriram_guroxugu_rafudisowiro_wegamim.pdfIn PDF document text
    • http://files.jillybeancakes78.com/uploads/1/3/0/9/130969169/e6355012.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/1/0437/4996/5985/files/jofufigofav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8651/0232/files/2825468711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8581/5205/files/60641285371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6259/9585/files/mufexavidivuradigubebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5468/4565/files/69822841529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4222/5832/files/38086830821.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3235/4727/files/doluvesibixugurikinof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/pokemon_diamond_rom_downloads.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3857/1670/files/rowirajogupalamibosem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/lifavigijefubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0910/6332/files/bavomafapemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3978/4103/files/jukasowenoromare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/89843061502.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 5

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_off000075f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F9 5668 bytes
SHA-256: 60b164081c5186736d6cd53a4551a4107e2bd004213b246ee8016efa65e9d809
font_01_sfnt_off0000891c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x891C 10660 bytes
SHA-256: bdd885818cc996b22e03316daa4612bf0e78ec7ceb86a2c604a2ecd7573b9a0d

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