Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a494ab5cd302640…

MALICIOUS

PDF

50.7 KB Created: 2020-08-05 16:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cee66d4a154a0466b8692323219e2697 SHA-1: b784f8ca2078b12a78dae392bbcac5cf6c4224e0 SHA-256: 0a494ab5cd30264041d6dc5d803b58f3d88e5449bb089ab305fa69a9d644c8e2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, many of which point to redirector infrastructure. The primary redirector URL, 'https://ttraff.cc/wb?keyword=immediate%20preoperative%20care%20pdf', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other links to what appears to be a link farm designed to mimic free software downloads, suggesting a phishing or malware distribution attempt.

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/wb?keyword=immediate%20preoperative%20care%20pdf In PDF document text
    • http://files.cmrcsystems.com/uploads/1/3/0/7/130738792/652aa1.pdfIn PDF document text
    • http://files.innovationsbuildingservices.com/uploads/1/3/1/4/131438741/3ca2f8128cf.pdfIn PDF document text
    • http://files.volpris.eu/uploads/1/3/2/6/132681901/xulagusupobu_nejiweb_xulozipepirura.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/1/0447/1400/0538/files/acrobat_reader_edit_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/legends_mod_minecraft_1._7._10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3582/0185/files/31937733007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48695811849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6545/0391/files/nogukiminuzanusesegat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8734/5304/files/15523811973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4532/9832/files/48430346705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/vuzoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0862/1735/files/gavamof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/62686931121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/1403484219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8396/4324/files/penabebifibiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9970/7805/files/dedojolovulowolanu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA3 4768 bytes
SHA-256: a30f13c8017463c49454d2144b67ddb64a153f6f13d10327d1ac58827393b6eb
font_01_sfnt_off00008cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD9 10288 bytes
SHA-256: ba17f898a22c0cd7a6378c9a02ce8882bf46e26493772ab7879b6e4e05c3ee4c
font_02_sfnt_off0000aff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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