Malicious PDF — malware analysis report

Static analysis result for SHA-256 355c3c4d149b3efc…

MALICIOUS

PDF

46.7 KB Created: 2020-08-09 15:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9cb8c281d8b525bf5390193d987e489 SHA-1: b41d0f2031a0b4d406c137e60e8e84b501c057c8 SHA-256: 355c3c4d149b3efcad6753a48cdd89c3cb486539466bbaf8ac77875ef803bfdf
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to obscure the final destination. The document also hosts a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The primary malicious link is https://ttraff.com/pify?keyword=lokmat+epaper+osmanabad+pdf, which likely leads to a phishing or malware delivery site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=lokmat+epaper+osmanabad+pdf
    • http://zefavo.josiepassantino.com/uploads/1/3/2/6/132682646/8053386.pdf
    • http://files.ciaobellawilliamstown.com/uploads/1/3/1/4/131412603/megekexoxet-lakunaxere.pdf
    • http://files.maddybradleycollection.com/uploads/1/3/1/6/131636814/f1cea02.pdf
    • http://jewev.smareachuk.org/uploads/1/3/1/4/131453645/refeb.pdf
    • http://zavaz.fieldofviewwg.org/uploads/1/3/1/4/131407406/3541186.pdf
    • https://cdn.shopify.com/s/files/1/0430/0367/4785/files/xoporeruramufanadasumani.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/kazine.pdf
    • https://cdn.shopify.com/s/files/1/0435/7593/5134/files/bivoju.pdf
    • https://cdn.shopify.com/s/files/1/0434/9886/4804/files/24751547731.pdf
    • https://cdn.shopify.com/s/files/1/0430/6472/1562/files/sociologie_de_l_ducation_durkheim.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/34286032248.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0993/files/4585688670.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/6003/files/87833771269.pdf
    • https://cdn.shopify.com/s/files/1/0433/4626/4213/files/sokifosobipuxadudawewituz.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_off0000793d.bin
0b84a6e19f4171d8fd74e4a1d51a620b4bb272cd3f94c3bcd672d111a68cc50c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793D 5300 bytes
font_01_sfnt_off00008b26.bin
18fcfc175cc605b5222a089ba5f96816d29ae40c879fb1174ba67e04a28fd40c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B26 10196 bytes

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