Malicious PDF — malware analysis report

Static analysis result for SHA-256 926567e2bc7c529e…

MALICIOUS

PDF

64.8 KB Created: 2020-08-11 06:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60a6c65ff53b606547f666a8dfdf7e4c SHA-1: d152f7d4453b3d71fc429ad4c4507db7cdc40f81 SHA-256: 926567e2bc7c529e0062ac80d89866b97be8c0884a0f98b3c15e925abcc31148
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=belajar+bahasa+arab+bagi+pemula+pdf'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking title, suggesting a lure to trick users into clicking the malicious link. No scripts were extracted, and the primary malicious activity observed is the redirection to a known malicious URL.

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.ru/pify?keyword=belajar+bahasa+arab+bagi+pemula+pdf
    • http://files.breastlearningonline.com/uploads/1/3/1/0/131070754/nuwozin.pdf
    • http://jijorupi.jusrydetrackclub.com/uploads/1/3/0/8/130874474/a4bb4.pdf
    • http://files.fishofmchenry.org/uploads/1/3/0/8/130814515/2135582.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/81187085438.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/wumefazuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/gekavakanepifunaxajanule.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/bugil.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9713/files/blank_outline_map_of_africa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/12739590229.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/53014788899.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/95712608351.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/64666238294.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/lobatisiga.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
stream_005_off0000c3d8.bin
aa4e6ccb706c66a1d7006d9379b60566386b54fd557c71418c71217e87c3dec8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC3D8 27688 bytes
font_00_sfnt_off000082e3.bin
4aa16f8b0bd47a6a9dfc12fa6c8cd001568a9c4bcf83e2c35835617387d29f07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E3 5720 bytes
font_01_sfnt_off00009634.bin
b90088c1c69b623afb585ebfcc531ddea49d509ca938fe3ab83d6172d8841f61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9634 14840 bytes

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