Malicious PDF — malware analysis report

Static analysis result for SHA-256 af977d88c208b6ce…

MALICIOUS

PDF

45.3 KB Created: 2020-08-23 18:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e8460b533ebd88739a00b25525db485 SHA-1: 69006cd8afbe0bd8b15d748c06c73046d6ec280e SHA-256: af977d88c208b6cea8096a76b4e1aa9ce7a9db305f3b0481da068895e16f4af3
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body text, though heavily obfuscated, contains a URL that appears to be a lure for a game download. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content. The file is classified as malicious due to the presence of these redirector links and the SEO link farm technique.

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/pify?keyword=hungry+shark+world+obb+free
    • http://ginud.asianvectorgroup.com/uploads/1/3/1/1/131164250/f05e7911a66d576.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/dimunanebeseperawoni.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/artinya_additional_information.pdf
    • https://cdn.shopify.com/s/files/1/0453/3475/7531/files/falling_leaves_adeline_yen_mah_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0616/4135/files/sexoniwuwigatebatesun.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/gojujesebumekod.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/xetudabenopuxunupuvap.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4199/files/calendario_accademico_unipd_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/9412/1379/files/jefuvewuk.pdf
    • https://cdn.shopify.com/s/files/1/0451/8277/9541/files/breath_of_the_wild_water_guides_shrine.pdf
    • https://cdn.shopify.com/s/files/1/0438/0730/9984/files/95414162658.pdf
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/design_of_aircraft_corke.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/goguwexawomuronafuzeputan.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/ledurovagawagoxudedizixi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/jowalineriwebotumopuluku.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000686a.bin
1c4d6694dae3b74478984dcbaa8b6b7909ca11bf5f823d9c257e38f836575036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686A 5528 bytes
font_01_sfnt_off00007b3d.bin
6a86fe49d8886542ce3c9f56a849cd53b1a36669805c1df4d2075cc85bf18a94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3D 14368 bytes

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