Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca1a3a259f2b0bc…

MALICIOUS

PDF

41.8 KB Created: 2020-08-18 19:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 30c74fbc92a868877500b9b443f0b6b5 SHA-1: fbe7e18ca10d7f1e3e7e5db8328caf51aa948a3c SHA-256: 0ca1a3a259f2b0bcd6ed5bb3ccf58ecc81ad506e6c2497ddeb092ea87ed5a2c3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL, 'https://ttraff.cc/pify?keyword=engineering+guide+vanilla+1-+300', is flagged as malicious and likely leads to a phishing or malware download page. The document body and heuristics indicate a link farm strategy to distribute malicious content.

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=engineering+guide+vanilla+1-+300 In PDF document text
    • http://vusur.wesmillermusiclessons.com/uploads/1/3/2/8/132814930/wupilenanoloxi.pdfIn PDF document text
    • http://files.medisysprepares.org/uploads/1/3/1/3/131383544/7567698.pdfIn PDF document text
    • http://files.eathorpepollherefords.com/uploads/1/3/1/3/131379868/tuvawajajozevosanox.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/1/0432/7738/5892/files/fedatenevofowubij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8270/9160/files/jiwukasuzusabotovid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/venonarazubejapaweropuxes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/minecraft_apk_ios_1._9._0._0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1608/3877/files/beguine_for_band.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1624/1831/files/84670337689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2799/6565/files/machine_design_shigley.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4017/7308/files/vokikasobonexori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/todevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1268/4967/files/genie_pro_screw_drive_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1835/3815/files/antibody_structure_and_types.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/disij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6630/8246/files/mmpi_2_manual_download.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_off0000662a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x662A 5224 bytes
SHA-256: 3a7aeae866bcda5d8e4ad0efd8a934747ba7ebeabcf1d8ff7db56721d2360395
font_01_sfnt_off0000780e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x780E 9996 bytes
SHA-256: f86e8083d0439458a4404acd77e1965eddaf660d729041d2184ea732bbe94eac

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