Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb1d280bb88c617…

MALICIOUS

PDF

39.9 KB Created: 2020-08-13 00:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 85ab959f0e069a65cca6a8259b2a54d0 SHA-1: 56daedb95881b4b045133a218641f0161a0125a0 SHA-256: 1cb1d280bb88c61744e3bfb13852ed0bc078fb4ea70ea49b4d0802acea5bcbe6
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Pearson algebra 2 common core online textbook pdf' and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of multiple Shopify links, while some are benign, contributes to a link farm strategy to obscure the primary malicious destination.

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=pearson+algebra+2+common+core+online+textbook+pdf In PDF document text
    • http://sapimis.coffeecartomancy.com/uploads/1/3/2/3/132303374/kesevizuten.pdfIn PDF document text
    • http://dirimita.nationalroadchurchofchrist.org/uploads/1/3/0/9/130969329/b3b37c6b7e6acb.pdfIn PDF document text
    • http://files.bch-marketing.com/uploads/1/3/0/7/130739633/f7dfb1e7b2c.pdfIn PDF document text
    • http://files.zamecoproducts.com/uploads/1/3/1/8/131859261/1640847.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/1/0436/6372/0613/files/retencion_restos_placentarios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/vanev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6404/1365/files/sql_greater_than_date.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2845/4298/files/understanding_and_using_english_grammar_4th_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2127/7096/files/ideology_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4931/9577/files/60654968712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9528/4130/files/mafipijoboza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/6945/2967/files/quanki_opt_out.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/6041871159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/23474898697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9825/1170/files/xumogepid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/wokunofonawomifeji.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 2

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_off00005af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF0 5880 bytes
SHA-256: 5fc00d9e9c942b548a3e862e4544a9d5f839b411cd9c03a39b26b14bffc4e24a
font_01_sfnt_off00006ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE0 10256 bytes
SHA-256: 41ea9a02273eea1f54d777ad63c3dff13f8e82988e3d8ce5331cb799ec990c08

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