Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2bbcb0f15bea6b…

MALICIOUS

PDF

39.1 KB Created: 2020-08-09 07:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 257627126f6cfbbdf8dcb8720ea97967 SHA-1: 99d4ede13e3cc9fbb4fc6c94638584546db6e2d8 SHA-256: 1c2bbcb0f15bea6b356791e99114b2e74fd79f3425454f91b577ba5121b57365
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a document title. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates the primary URL leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger scheme to generate traffic through numerous external links, many of which point to benign Shopify domains but are likely used to obscure the malicious destination. The ML classifier strongly supports the malicious verdict.

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=insects+and+other+arthropods+of+tropical+america+pdf In PDF document text
    • http://files.wekesa.net/uploads/1/3/2/6/132696598/e9678149de61d.pdfIn PDF document text
    • http://files.jamforvets.org/uploads/1/3/1/4/131453494/zazitafozoteg.pdfIn PDF document text
    • http://files.coachhousecochins.com/uploads/1/3/1/6/131607029/rexakemirug.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/1/0439/4146/2174/files/sas_certification_prep_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2476/0488/files/30690613349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/kinemubimopober.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/62568190577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8746/9471/files/pozanibefalaxew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/pepafevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7115/2023/files/43535080647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8738/1155/files/maxulipofagugatozofemun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/35525660370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/kivasekagugexezowezejik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7754/1792/files/5610409880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/64990340498.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_off00005dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC8 5332 bytes
SHA-256: 96356a64ca5202def5ca6bde451696d7d8a0be800ffa8963b75af3ea2af8473f
font_01_sfnt_off00006fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC1 9268 bytes
SHA-256: c8d7b672c046781fafce394fbf1890fd408e7bbb64c1196556931493332c5692

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