Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef366f979514c20…

MALICIOUS

PDF

67.6 KB Created: 2020-10-29 16:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 815fb86e551977693eb3982f76c949fe SHA-1: f6b3d295daf942e8a12c12cbb94ad3d5c049f23a SHA-256: 7ef366f979514c2034fa10138df1e5ae019346551bb9f7d1bc9195f2ee8a81a6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://gettraff.ru/strik?keyword=sf+progressive+voter+guide'. The document body, though heavily obfuscated, contains this URL, suggesting a lure to a malicious site. The presence of many external PDF links further indicates a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://gettraff.ru/strik?keyword=sf+progressive+voter+guide
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f87621a7e1ce.pdf
    • https://pafuwaron.weebly.com/uploads/1/3/4/3/134385690/8696868.pdf
    • https://cdn-cms.f-static.net/uploads/4380078/normal_5f92810d1faa7.pdf
    • https://cdn-cms.f-static.net/uploads/4375704/normal_5f985f4c048dc.pdf
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5f90e5ee19dc1.pdf
    • https://cdn-cms.f-static.net/uploads/4377100/normal_5f91f70c22174.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0502/7010/9890/files/44840837681.pdf
    • https://s3.amazonaws.com/tabobujimo/xawojatiji.pdf
    • https://s3.amazonaws.com/henghuili-files/brahma_purana.pdf
    • https://cdn.shopify.com/s/files/1/0502/6283/5368/files/procare_medical_transportation.pdf
    • https://cdn.shopify.com/s/files/1/0502/2662/6718/files/text_to_speech_android_10.pdf
    • https://s3.amazonaws.com/wuniku/4035980640.pdf
    • https://cdn.shopify.com/s/files/1/0507/0268/0263/files/zudazuje.pdf
    • https://s3.amazonaws.com/paxivogedewilu/intranet_vs_internet.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea24.bin
8186806b9c846428121120fb3d37731bcb96237947ce2a79b6fc0cb6b1e579fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA24 5128 bytes
font_01_sfnt_off0000fbb1.bin
524fab0645c5d35febfc2c2244b7f877976218fec85cc319275ea814b0b089ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB1 2792 bytes

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