Malicious PDF — malware analysis report

Static analysis result for SHA-256 105f08292591b47f…

MALICIOUS

PDF

53.7 KB Created: 2020-08-19 10:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 75c6da0ff4a642aa6ccd6ba48be1179c SHA-1: 03548d897530195a51a490540049635437a9ff2e SHA-256: 105f08292591b47f437e8f8c612b81b685c86a87fda2d339d00195470898bb4b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a redirector service, which in turn leads to a malicious URL. This suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports malicious intent.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.com/pify?keyword=linpack+benchmark++windows In PDF document text
    • http://files.paperrockfork.com/uploads/1/3/2/6/132681443/81cf1b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6337/7048/files/lujibaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/23198689573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/gap_kids_size_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/98881566528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8366/1461/files/13411828502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3022/4794/files/21367449033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1608/4891/files/lifupixilovivew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8242/4215/files/25525329597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8897/3729/files/hillbilly_elegy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/33902027993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8933/7256/files/43275251984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/43678764118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/bengali_movie_shikari_full.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79BA 5228 bytes
SHA-256: 8898a28ed7dbee28bd2cebe98a319adca73f42cc79d22411d732d230a6c2b05d
font_01_sfnt_off00008b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B40 15992 bytes
SHA-256: 3ffb29e382d9afca9b0651582c663ab2065782106b73f1c17051e76273010c0e
font_02_sfnt_off0000bc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC22 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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