Malicious PDF — malware analysis report

Static analysis result for SHA-256 3583da31bbb46e70…

MALICIOUS

PDF

51.1 KB Created: 2020-08-19 18:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 854b5cadab24868a41681d5c223fcbae SHA-1: 84a3cc59c9df4444bf18e6b31572620ac7d299ff SHA-256: 3583da31bbb46e701fdda90db9d97c1ab34e75f8ca3f26c68694324f210f88ea
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 Shopify domains, likely as part of an SEO link farm. One of these links, however, directs to a known malicious redirector at 'ttraff.ru'. This suggests the document is designed to lure users into clicking malicious links, potentially for phishing or malware distribution. No scripts were extracted, and the document body is heavily obfuscated.

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=version+android+galaxy+tab+2+10.+1
    • http://files.brothernature.us/uploads/1/3/1/3/131379246/dipujejumaboxoza.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3821/files/19027441553.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/appendicite_dfinition.pdf
    • https://cdn.shopify.com/s/files/1/0436/1725/5581/files/bosch_serie_4_washing_machine_instruction_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/9749/8535/files/john_wick_2_hd_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0463/5970/7803/files/58240027536.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0071/files/the_adulateur.pdf
    • https://cdn.shopify.com/s/files/1/0428/2892/3046/files/sitexuvegaxodasifupel.pdf
    • https://cdn.shopify.com/s/files/1/0430/1966/5561/files/fupajukipajutijelud.pdf
    • https://cdn.shopify.com/s/files/1/0439/3782/4926/files/topifomijowofazadenu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/59527283811.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/kalagobexud.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2268/files/gujanukuziredo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6983/2342/files/muvemalovozesivulejalego.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29942388251.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_off000081e6.bin
d64cc822b46f19a9f0b2e01e1fc1c39067b81ca06b98a0fb3e3cdfcb46cd8ef6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E6 5624 bytes
font_01_sfnt_off00009528.bin
c117e580cebc0eb9a42dd08c447e5128f1629a35c51a4972d3983daaa388f964		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9528 13380 bytes

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