Malicious PDF — malware analysis report

Static analysis result for SHA-256 caad5c017d7ab20c…

MALICIOUS

PDF

55.1 KB Created: 2020-08-18 13:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 538b6826749b4efb0aa34a4e5a6cb693 SHA-1: 9b1a24dddc4903753b0e108699739968fd2b2315 SHA-256: caad5c017d7ab20c19a2220a81d3b77b39aca298ae125245c863beef5b0d2518
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. It also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack pattern involves luring the user with a seemingly relevant document (TV guide) to click the malicious link, which is likely intended for phishing or malware delivery.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=frontier+communications+tv+guide+texas
    • http://files.bradleyestates.co.uk/uploads/1/3/0/8/130813694/2890579.pdf
    • http://files.beyondnailartsupply.com/uploads/1/3/1/3/131381919/4412680.pdf
    • http://files.earllproperties.com/uploads/1/3/1/3/131384635/2206246.pdf
    • https://cdn.shopify.com/s/files/1/0435/2914/2426/files/fahrenheit_451_study_guide_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/8765/1235/files/mavunireju.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/gizugewusitusuva.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/sotuxitelotizanuje.pdf
    • https://cdn.shopify.com/s/files/1/0431/0240/4769/files/ziperan.pdf
    • https://cdn.shopify.com/s/files/1/0439/4080/6824/files/jixidivoma.pdf
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/41078170744.pdf
    • https://cdn.shopify.com/s/files/1/0431/8602/8708/files/functional_strength_training_exercises.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_off00009adf.bin
f196c54e05d6cd44119518a3975caa2ecd2da6c4477e9642c43c60faf39ea7ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ADF 5308 bytes
font_01_sfnt_off0000acdc.bin
9fd1e393221cc4d957474ba27ab253f63338447b0d1e5c7eb57b495bc0d26a1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACDC 10120 bytes

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