Malicious PDF — malware analysis report

Static analysis result for SHA-256 795b721d1cea5c5b…

MALICIOUS

PDF

47.5 KB Created: 2020-08-07 01:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e71a9c2938bdc88285f6f894b90a042 SHA-1: 182aad456e7a5d4535b4e45be1aeb1e30ed811cc SHA-256: 795b721d1cea5c5b2f91226a67e50eecac3ce5a3432aca3a0703a9ead1b49a19
140 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, indicating a lure to download a free book which likely leads to malicious content. No scripts were extracted from this sample.

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=telecharger+livre+gratuit+pour+apprendre+l+anglais+pdf
    • http://files.howlinghillsranch.com/uploads/1/3/0/7/130776487/pilokerekojem.pdf
    • http://files.themascotsyndicate.com/uploads/1/3/2/6/132695636/zovowisa.pdf
    • http://files.christinacsmedia.com/uploads/1/3/2/6/132682441/2292742.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6119/files/callate_y_besame_zara_black_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/61419144596.pdf
    • https://cdn.shopify.com/s/files/1/0434/8752/7078/files/36454354009.pdf
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/gugono.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0428/files/zavejisibaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/kaxotixubegin.pdf
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/8789435001.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/66093306255.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68876684382.pdf
    • https://cdn.shopify.com/s/files/1/0432/1830/5179/files/wiwag.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6156/files/44122026782.pdf
    • https://cdn.shopify.com/s/files/1/0431/6086/2874/files/amadeus_peter_shaffer.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_off000069c9.bin
07006d944aa812b9d337ce002c49513e857f9bbf2a4c17b42d88ab903987bf2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C9 5308 bytes
font_01_sfnt_off00007bcf.bin
611ac81bf69881b3427f73b1b6be4d2d5d6085cf57b1abef259f2d028557a2b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCF 11672 bytes
font_02_sfnt_off0000a0fd.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0FD 4324 bytes