Malicious PDF — malware analysis report

Static analysis result for SHA-256 a349be6e697f4050…

MALICIOUS

PDF

41.6 KB Created: 2020-09-01 09:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96b9a0e28c993bfd68e9d2a6a401dcc9 SHA-1: 180d0d6cb547c2ffeee92916a062121bddc783d8 SHA-256: a349be6e697f405068c03d19ccd2768ebc240dc596cce8635c3cec4ec620bc6a
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains numerous embedded links. One of these links, 'https://ttraff.cc/wix?keyword=acer+27+predator+xb271hu+manual', points to a known malicious redirector. The document also exhibits characteristics of a link farm, with many external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=acer+27+predator+xb271hu+manual
    • https://cdn.shopify.com/s/files/1/0431/2619/4333/files/aurora_teagarden_movies.pdf
    • https://cdn.shopify.com/s/files/1/0431/1348/0354/files/ritidugijebawomuxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/sql_server_analysis_services_2020_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3574/files/free_kindergarten_writing_sentences_worksheets.pdf
    • https://static.usrfiles.com/ugd/6924eb_6424751a764b43c4bc71168134030a4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e28afd06c8264c08865d04d662f7ae40.pdf
    • https://static.usrfiles.com/ugd/b8c837_6366e65a4a3b459eb9fa0198f48752ea.pdf
    • https://static.usrfiles.com/ugd/fa6f14_f4f01d38e58e48c0812fe685fb5d961d.pdf
    • https://static.usrfiles.com/ugd/0a0016_8bdd21c69e9d456d9d434385e99a284b.pdf
    • https://static.usrfiles.com/ugd/de60da_3d39e56e38b743b5849c86e6b8b95a0f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6449315d0e44409598dd7ff201f59c26.pdf
    • https://static.usrfiles.com/ugd/accd1f_6b643834f4214c02afac569610bf303a.pdf
    • https://static.usrfiles.com/ugd/b8c837_13c88426f0d94e63b2eba14d524863fe.pdf
    • https://static.usrfiles.com/ugd/5be868_fadcb04f98c64b12bc9224ddb06d9707.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5127/files/57717561884.pdf
    • https://cdn.shopify.com/s/files/1/0433/8732/2522/files/86926205438.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7914/files/37375672423.pdf
    • https://cdn.shopify.com/s/files/1/0431/0728/7206/files/forolomexofikopupedob.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_off00006271.bin
f97eaa93c445c6bf08e4997f52e8789d907a9ef6704f7e326667021f9732199b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6271 5596 bytes
font_01_sfnt_off0000755c.bin
afe116d959f32e51b975c2189191902809ef2e06d8c1a29f8a2e25b594ecbe91
pdf-font-stream PDF embedded font (sfnt) at offset 0x755C 10548 bytes