Malicious PDF — malware analysis report

Static analysis result for SHA-256 3175aa0e86b9959b…

MALICIOUS

PDF

47.2 KB Created: 2020-08-10 03:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c669b9307934f8b635d1f853f8045fe SHA-1: eaab3507e8bb1f099d5d9e964b6822463b6c9598 SHA-256: 3175aa0e86b9959b8b2dc89a44707d25b3e30ea749efa84e2eca573535bfe8d9
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL. The document body, though heavily obfuscated, contains the malicious URL and references to 'wkhtmltopdf', suggesting it was generated by a tool. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to distribute traffic to the malicious redirector.

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=synchronized+cardioversion+pdf
    • http://files.walkervalleyband.com/uploads/1/3/0/8/130813489/9564112.pdf
    • http://files.utahmicroloanfund.org/uploads/1/3/0/8/130815009/jojaziluviji.pdf
    • http://gedenuxi.abettertravelagency.com/uploads/1/3/1/6/131607131/muzevokumojedafa.pdf
    • http://files.imolagaspar.com/uploads/1/3/1/4/131409794/jofitato_wamujezifakuwo_forolu_wobataparugu.pdf
    • http://mesibotu.candacederksen.com/uploads/1/3/2/7/132740541/842419.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/redukobefojunefofarika.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/lometif.pdf
    • https://cdn.shopify.com/s/files/1/0434/7143/7984/files/riwafasujojelufijij.pdf
    • https://cdn.shopify.com/s/files/1/0431/2141/0210/files/45161590216.pdf
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/peter_king_podcast.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/86156604245.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/basic_english_grammar_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/3622/1341/files/jumbled_sentences_for_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0435/0119/1328/files/67668736015.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4269/files/41411589898.pdf
    • https://cdn.shopify.com/s/files/1/0438/0963/6512/files/lafegiwadoti.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_off00007a64.bin
e77bc99e28f1bcae908371448f7409b15b3a57c170825585f17c0b2cf74f219a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A64 5524 bytes
font_01_sfnt_off00008d43.bin
fed2b513480b18a5dc71926468f527c3e426dd61b8d4b5c33fca56983fb1c929		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D43 10316 bytes

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