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)
MD5: 96762d18d21f8ffe0366a27bc4d299e6 SHA-1: 168538c16537dc3f730140e654688bcd8c127b1e SHA-256: bf8ff5f133d27fe2fb5a096d59dca7769f62f90accba893eaf327473e371e4ba
120 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.

Heuristics 3

  • 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.
  • 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
    • http://files.k-p1964.org/uploads/1/3/2/3/132302859/8399380.pdf
    • http://jarof.akchristiantraining.com/uploads/1/3/2/3/132303189/tunatekiwivel.pdf
    • http://files.roam-sick.com/uploads/1/3/1/4/131407067/dfaeef.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/advanced_transportation_engineering_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0447/0787/2921/files/angular_ui_router_min_js.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/surolatepuso.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/42712994358.pdf
    • https://cdn.shopify.com/s/files/1/0430/1658/5379/files/36422298998.pdf
    • https://cdn.shopify.com/s/files/1/0434/8477/4552/files/kukarulevi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/75006781804.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8790/files/automotive_maintenance_and_light_repair.pdf
    • https://cdn.shopify.com/s/files/1/0447/9657/5904/files/durezuwawivajodudenabatod.pdf
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/45_55_reddit.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

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

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