Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf8ff5f133d27fe2…

MALICIOUS

PDF

47.6 KB Created: 2020-08-11 21:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 96762d18d21f8ffe0366a27bc4d299e6 SHA-1: 168538c16537dc3f730140e654688bcd8c127b1e SHA-256: bf8ff5f133d27fe2fb5a096d59dca7769f62f90accba893eaf327473e371e4ba
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially garbled, includes text related to 'Lei 8080 resumo enfermagem pdf' and the malicious URL, suggesting a lure to disguise malicious content. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm or SEO manipulation tactic. No scripts were extracted from this sample.

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/wb?keyword=lei%208080%20resumo%20enfermagem%20pdf In PDF document text
    • http://files.k-p1964.org/uploads/1/3/2/3/132302859/8399380.pdfIn PDF document text
    • http://jarof.akchristiantraining.com/uploads/1/3/2/3/132303189/tunatekiwivel.pdfIn PDF document text
    • http://files.roam-sick.com/uploads/1/3/1/4/131407067/dfaeef.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/1/0427/4647/8759/files/advanced_transportation_engineering_nptel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0787/2921/files/angular_ui_router_min_js.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/surolatepuso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/42712994358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1658/5379/files/36422298998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8477/4552/files/kukarulevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/75006781804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6581/8790/files/automotive_maintenance_and_light_repair.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9657/5904/files/durezuwawivajodudenabatod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/45_55_reddit.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6233 5608 bytes
SHA-256: 2c4c933654149a6b79adb7b989fe7996e9cdd56afd2ab7043f660cdbd93d2043
font_01_sfnt_off00007532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7532 12292 bytes
SHA-256: ee2f07f012a860f9a1aa53f05562c45b3a9d1458ff3a25ab269ccd486c401099
font_02_sfnt_off00009a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A4E 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0

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