Malicious PDF — malware analysis report

Static analysis result for SHA-256 041c72132ebf78c7…

MALICIOUS

PDF

43.9 KB Created: 2020-07-31 20:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 221edca902fec987b92ee5e83431f37a SHA-1: 7be5a3653de2d0dd20a1f448695101eeb367652a SHA-256: 041c72132ebf78c7615274dd51e6b07042cd472eaeafc6cd38f65bc1741ad5b8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirection and a link farm, pointing to a malicious redirector URL. The document body, though heavily obfuscated, contains the malicious URL and references to GitHub, suggesting a social engineering lure. The ML classifier strongly indicates 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.cc/pify?keyword=github+compare+two+commits In PDF document text
    • http://files.christophercanniff.com/uploads/1/3/1/4/131453267/cb953cf.pdfIn PDF document text
    • http://files.rebeccaewebber.com/uploads/1/3/0/8/130874114/64edf14b9897.pdfIn PDF document text
    • http://files.iriselainecottagebnb.com/uploads/1/3/1/3/131398279/lasev_fevajama_fitebaf.pdfIn PDF document text
    • http://files.protectthegame.com/uploads/1/3/1/3/131383727/6841021.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/1/0438/7205/9547/files/27158752698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7441/1926/files/jipamudus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/47665374071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/niwakozekixitiwobukuduti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/retusizibitikot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2819/3186/files/fobapizasefopesuviropaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7959/6187/files/59121242662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/futikuzazojexopuvenewipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7874/6261/files/sadekuleg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8110/5562/files/tonakevivoruxarasamujuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6471/1575/files/class_d_water_license_practice_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/21813428284.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 8

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_off00006901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6901 5404 bytes
SHA-256: 9dfce894606b57d75bfe697242d53f5a92eaf79da3390f0121a450a46e09c99e
font_01_sfnt_off00007b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4A 11772 bytes
SHA-256: 0b1c73126f4daad9bae6f3d715dce0dbc39f54b9561e116c9b714ef142e5d934

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