Malicious PDF — malware analysis report

Static analysis result for SHA-256 d43b9c4b8977ae3f…

MALICIOUS

PDF

52.2 KB Created: 2020-08-30 20:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85fe294ab454c87cc084563e679f61a4 SHA-1: 092d30adc2d289275d66ef8b12764bc680a69987 SHA-256: d43b9c4b8977ae3f2ed2ba43e637cee50a1281f163d92895011362cfd2dca8af
140 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to funnel victims to phishing sites or malware downloads. The document also contains a large number of links to PDFs hosted on static.usrfiles.com, suggesting a link farm or SEO poisoning tactic. The presence of a callback lure indicates a potential social engineering attempt to engage the user directly. 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/wix?keyword=solid+state+electronic+devices+7th+g
    • https://static.usrfiles.com/ugd/b8c837_61a8fd9d557f4068bb5e783080b20db6.pdf
    • https://static.usrfiles.com/ugd/44b221_e5b73fee5e024e75b98df477b51c56bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c129ede45344c8f9c428e1332799957.pdf
    • https://static.usrfiles.com/ugd/b8c837_7967f1d3deb44bf9ba298d13a5324efb.pdf
    • https://static.usrfiles.com/ugd/b8c837_65f5a4aa69d9414ab67941a57846e3ee.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_660e7f1392ff4a68bac8e8ddd4395f1b.pdf
    • https://static.usrfiles.com/ugd/1a89c8_9589de83df02460b8d8ddc243e2133a2.pdf
    • https://static.usrfiles.com/ugd/76156b_e1b9613234594a0d89685be6665cd836.pdf
    • https://static.usrfiles.com/ugd/9d66c7_fe1e44ca7cf04807b650d7aa975e62a0.pdf
    • https://static.usrfiles.com/ugd/225520_c8fc947dc6f54007969cd4d5e946a7fa.pdf
    • https://static.usrfiles.com/ugd/c1de29_2005b26d5d194b239dcbd2d36b373228.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6616c7f9bb64566a709e333336c85f1.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_off00006f4f.bin
9b92e0d14f84605150877f953851ce44f363aa193b3b0f3180bec41b601254fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4F 5444 bytes
font_01_sfnt_off000081d0.bin
d6147eb28da724d993a801d57a7566e9ef6d20887984e2fe7e76754d3930c01a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81D0 11304 bytes
font_02_sfnt_off0000a728.bin
b72c5ef61ac0838f8f9a0e3d38e4b19ae129fd2cf15d0ac8f641381139a0c743		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA728 18408 bytes

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