Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b2b2f3ad6ec174…

MALICIOUS

PDF

42.3 KB Created: 2020-08-23 10:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ee02422cb26ad39ad671f0a92c9e1255 SHA-1: 6c51c9a0dd51568e6a5d4b4d507be5ec8fd84697 SHA-256: f4b2b2f3ad6ec17451bfc4b0745bfcd034813304644756cb3800ada00e99aac4
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, 'https://ttraff.com/pify?keyword=bomb+calorimeter+journal+pdf', which is flagged as malicious. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a lure to a malicious site. The ML classifier also strongly indicated 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.com/pify?keyword=bomb+calorimeter+journal+pdf In PDF document text
    • http://files.deevineimaginations.com/uploads/1/3/1/8/131871614/tubugeferoruwox-tedivurex-rawuz-sadexor.pdfIn PDF document text
    • http://files.publicarchives.info/uploads/1/3/2/7/132710797/luronuxegewopu.pdfIn PDF document text
    • http://files.originalcable.com/uploads/1/3/1/1/131163953/navemirexeb.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/1/0433/9548/1750/files/36461214724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/909040323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0348/6103/files/15757787017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3775/3501/files/68585508085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/windows_7_ova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/xiwituzidunavawuxitevin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/91853678199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/34169091638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4583/8239/files/absolute_cost_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6356/5727/files/30691009755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0327/3628/files/67509303670.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 6

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_off00006646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6646 5388 bytes
SHA-256: cab3ee831aff68f79fcb53cc51f11839d5cdfea21a6dbd8da42d788bdbbc18fb
font_01_sfnt_off0000787a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x787A 10452 bytes
SHA-256: 439459a01e97a76ea5e0b9f913bb06d4dd3d82130134df6ea62f945f3bd2695f

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