Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b3f16fe48c8b7a…

MALICIOUS

PDF

46.4 KB Created: 2020-08-06 21:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4d38f400f4ac9745eac304cd3122df20 SHA-1: 211bebe7527e9082c43264c191d4a5b103d1ca7f SHA-256: 72b3f16fe48c8b7ab6b6d4c2babfcc83ae454403475af8a1e4c96334b53f3dad
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body and heuristics indicate a lure for a 'free dictionary' PDF, which is a common phishing tactic. The presence of a malicious redirector suggests the intent is to lead the user to a site that likely hosts further malicious content or exploits.

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.ru/pify?keyword=dictionnaire+allemand+fran%25C3%25A7ais+gratuit+pdf In PDF document text
    • http://files.theliteraturefactory.com.au/uploads/1/3/2/3/132302907/moganafezizewan.pdfIn PDF document text
    • http://mulim.arcofplattecounty.com/uploads/1/3/0/8/130815017/rixatibutudit.pdfIn PDF document text
    • http://files.halifaxstreetangels.org/uploads/1/3/1/4/131437676/tapijixexofoku.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/1/0428/9835/8432/files/kemulubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/bibofotijiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/videopad_5._01_registration_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3716/9576/files/vekaxozogidoxub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3694/1215/files/jilamodenevadapifowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9453/1493/files/3932297837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/kutobikulojuvejuvubuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/aisin_awf21.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/gitegigutiverimonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9095/1848/files/wibozedex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5229/2513/files/23410319807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/wavelet_transform_theory.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_off00007115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7115 5656 bytes
SHA-256: 5d93baf61f2489a0c0273d9d3065b1d419e22174c41ad73de79462f661c2d36e
font_01_sfnt_off000083ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83FF 11972 bytes
SHA-256: 1100e0fad4b2fe0a7cc8c78a975e3e3d484a37874c1b9b7fcec16a22770ecf07

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