Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a3f2f2fe5366f45…

MALICIOUS

PDF

41.3 KB Created: 2020-08-11 02:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52ac6dee72d9a6511569dd748844554d SHA-1: 96f381f640ddf12a890264a79c3054ae65be24c3 SHA-256: 4a3f2f2fe5366f457c7da30e23715eb8b527c3d4072dd73bbe832fe513eee1f3
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One prominent link, 'https://ttraff.ru/pify?keyword=accounting+theory+and+practice+pdf+download', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify URLs, reinforcing the lure of downloading a PDF. The primary attack pattern is social engineering via a malicious link embedded within the document.

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=accounting+theory+and+practice+pdf+download
    • http://files.turner-mrs.com/uploads/1/3/2/6/132696598/3278026.pdf
    • http://files.maestromusiclessons.org/uploads/1/3/1/4/131438348/e0ee2d25dc.pdf
    • http://files.thewellnesstraininginstitute.com/uploads/1/3/0/7/130776609/173245.pdf
    • http://nutufuko.juliewiegand.com/uploads/1/3/0/7/130776208/9215823.pdf
    • http://durevamud.gbdinc.net/uploads/1/3/1/0/131070993/pugoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/6998/7223/files/binary_tree_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3852/files/raxoxunosexorepomakor.pdf
    • https://cdn.shopify.com/s/files/1/0432/2046/7869/files/sufex.pdf
    • https://cdn.shopify.com/s/files/1/0429/4069/4684/files/gungeon_gnawed_key.pdf
    • https://cdn.shopify.com/s/files/1/0437/9898/6909/files/39207248547.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lorirazapevimixawas.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/flowers_for_algernon_full.pdf
    • https://cdn.shopify.com/s/files/1/0438/7799/0568/files/65516920659.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/titezenulolewirotof.pdf
    • https://cdn.shopify.com/s/files/1/0429/9997/1999/files/86610034311.pdf
    • https://cdn.shopify.com/s/files/1/0448/2092/2528/files/advantages_and_disadvantages_of_mixed_economic_system.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/89120928829.pdf
    • https://cdn.shopify.com/s/files/1/0431/0627/1394/files/bukebitirowiroderisilorot.pdf
    • https://cdn.shopify.com/s/files/1/0447/8078/1734/files/character_types_worksheet.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
font_00_sfnt_off000053e0.bin
b8feea75afba46dc12e7b15fe84e415de0d54ce8a96a04abb50e9c484184c7dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x53E0 5304 bytes
font_01_sfnt_off000065f2.bin
494942f11a56a6ae70a3186a057e8d2c40ca024f355db0367b9bcc587a18de1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x65F2 9936 bytes
font_02_sfnt_off000087ef.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x87EF 4324 bytes