Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba11c7cf7b766f5…

MALICIOUS

PDF

45.2 KB Created: 2020-07-27 06:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76f0e5188c3da5b28e9d354230718201 SHA-1: 637e17c7a78060f5c385938cf716049da11e72d3 SHA-256: dba11c7cf7b766f5a2e76162665611267dbfde4489d6219cb99ea98682d63ea1
140 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL (ttraff.ru) which is flagged as malicious. Additionally, it hosts a large number of links to other PDFs on Shopify domains, suggesting a link farm for SEO manipulation or to obscure malicious destinations. The document body, though heavily obfuscated, appears to be a lure related to 'Giant bikes size guide nz', and a heuristic indicates a callback phishing or tech-support scam pattern. The presence of numerous embedded URLs points towards an attempt to direct users to malicious content.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=giant+bikes+size+guide+nz
    • http://files.krisjost.com/uploads/1/3/1/6/131636990/xekufokipowaxazozo.pdf
    • http://files.juliathepotter.com/uploads/1/3/1/4/131453348/zajof_kituzatukuzaku_tubumax_nuvajisak.pdf
    • http://files.oregonceramicassociation.com/uploads/1/3/1/8/131871980/7379e.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/ropaxuko.pdf
    • https://cdn.shopify.com/s/files/1/0434/3293/5574/files/lovizafegu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9529/files/80202043561.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/32428246639.pdf
    • https://cdn.shopify.com/s/files/1/0429/2011/6380/files/topufuzuxitovijas.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/suwelagukokemofidoxup.pdf
    • https://cdn.shopify.com/s/files/1/0433/7562/4350/files/pirusadujexonepuxaxal.pdf
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/lijoribanututi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/43086010113.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/23501967799.pdf
    • https://cdn.shopify.com/s/files/1/0429/3279/7603/files/9513710428.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kikurum.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/
    • https://cdn.shopify.com/s/files/1/0429/2011/6380/files/topufuzuxitovija

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000735f.bin
75aaee853541b601284b67fdae7cadacf9d138d5a31f93ac4e0befe66c57ab96
pdf-font-stream PDF embedded font (sfnt) at offset 0x735F 4920 bytes
font_01_sfnt_off00008437.bin
a98ea7e439c3d0f45a462216865fbfbe138e566ea84c5015201cd2b57e5ff21f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8437 10696 bytes