Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b46b2ec550f6920…

MALICIOUS

PDF

61.5 KB Created: 2020-08-05 05:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 33552e3cf9ecd5e1011c5e0ba8195d7c SHA-1: 5d1d67eaeab32fcfdba2253fdd4033ca36f1dcbb SHA-256: 2b46b2ec550f692076c62aa1ff1b30eebca53fb09ad25b0ef3b7695499f2559f
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though partially corrupted, contains the text 'Coliformes fécaux definition pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier 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.ru/pify?keyword=coliformes+f%25C3%25A9caux+d%25C3%25A9finition+pdf In PDF document text
    • http://files.alhs18011.org/uploads/1/3/1/6/131637477/89e45e6db95a3f.pdfIn PDF document text
    • http://files.demanddj.com/uploads/1/3/0/7/130776381/4038264.pdfIn PDF document text
    • http://wuriwa.sadeghimckenzie.com/uploads/1/3/1/3/131381204/6fb4d.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/1/0430/9755/5093/files/jatapizipabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8911/5801/files/nuwomibutiwitapeta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/types_of_algorithm_in_computer_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5037/6099/files/cadillac_cts_2020_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/37838575692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wevanedinuwisuvajolow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8995/8814/files/xekilemawiveru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/8854875140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3943/8486/files/ripevokusomilumeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/calculus_graphical_numerical_algebraic_4th_edition_online_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/dadenizifirepusawonewara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/54502598262.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 3

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_off0000ad36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD36 5416 bytes
SHA-256: d238aee1644519c267fb85ac3f45a4daf08c42ed1d59c282b1ef5d0221c3839b
font_01_sfnt_off0000bf47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF47 12796 bytes
SHA-256: 33790ec6ae5d14961465dc480022f4910a08d2530517a0f547ac1071e7106b72

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