Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc8cf256ae9ffaeb…

MALICIOUS

PDF

53.9 KB Created: 2020-08-10 01:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b850471cd8cc4337b3e4fe531d343d43 SHA-1: 60f4ffd346be941e850b2c977ecb963da87a0859 SHA-256: fc8cf256ae9ffaeb56d86339b57e3b3498043fbfa2a376575c086d35370dd14b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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=mathematical+inequalities+reasoning+pdf In PDF document text
    • http://files.athensprep.org/uploads/1/3/0/7/130775304/bonuda.pdfIn PDF document text
    • http://vadupalo.ofcourseyoucantravel.com/uploads/1/3/0/7/130739267/sekolamanekur.pdfIn PDF document text
    • http://files.samuel-evans.co.uk/uploads/1/3/1/3/131379149/xujelo-jirokesaxuzu.pdfIn PDF document text
    • http://files.georgehi.net/uploads/1/3/2/6/132682048/bujeb_didizetidazipi.pdfIn PDF document text
    • http://files.inspiralpathways.com/uploads/1/3/1/0/131070520/nokaruj.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/1/0431/4556/0219/files/lulubuwivenedik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6879/2732/files/binary_number_system_mcq.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/81361125546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/sunufetabasal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4076/6109/files/ximefeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/75601127002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8070/2366/files/54138162730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6642/4470/files/33027785873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zogubarekerebadopotuleju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/fuminawutigagurew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/online_editor_free_trial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/56647313046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1257/0783/files/dulofewuwusozitevovula.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_off00009281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9281 5700 bytes
SHA-256: 92f6058c5e139312585fe748150db13e7fb49e494445e3cbc961fe44371faa83
font_01_sfnt_off0000a5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5BF 10828 bytes
SHA-256: dab9ae64de7359a8398dc2f0c0280826c43935b7bbb71afebdc3566141ea14de

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