Malicious PDF — malware analysis report

Static analysis result for SHA-256 5597c444a33dee99…

MALICIOUS

PDF

41.4 KB Created: 2020-08-24 21:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 923cce369b619aaf0678608ec8ea6ff1 SHA-1: 42598b3ca85cc8378150622ddd20aab11c4ce745 SHA-256: 5597c444a33dee99ca0f8800be7a111dd383db091de97f68fec519c6ded39501
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with many links pointing to Shopify domains, but one critical link to 'ttraff.ru' is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking string related to 'Apex legends'. This suggests a phishing or scam attempt using a link farm to obscure the malicious destination.

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=apex+legends+cross+platform+season+2
    • http://lavobaze.drmarkhastings.com/uploads/1/3/1/1/131164273/1574389.pdf
    • http://files.primariuscorpservices.com/uploads/1/3/1/4/131453645/2175959.pdf
    • https://cdn.shopify.com/s/files/1/0429/2126/3271/files/wibekawasozerojenijaguwus.pdf
    • https://cdn.shopify.com/s/files/1/0430/8955/9705/files/maperivipikaxiwekunowotul.pdf
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/46287003099.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/secondary_math_2_module_2_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/jejagepuva.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/femitoravakipivigutajaboj.pdf
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/nalesi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5169/6796/files/baptism_certificate_free_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/bopogukixutudu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/wekonarukiwifenojugubozix.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/44787960121.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_off00006192.bin
c6d81005aef2be927dd5bad8a32db1d91f177da556e41df325c7fe7030ab32b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6192 5664 bytes
font_01_sfnt_off000074c4.bin
40e731943b76536915301db91d1349724d0f31ff03a227a531255faab8b7c668		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C4 10616 bytes

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