Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9b3aac7218d7cd…

MALICIOUS

PDF

43.8 KB Created: 2020-08-21 12:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f8ddf4fcc38e7f1fad7507e3844c0e8 SHA-1: e973c2c0bfa775ecef138b5f0449c1c54396ba9b SHA-256: 6a9b3aac7218d7cd4cf8a732d74587270d8db105a68fda543c9b02784c28576e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body and embedded links suggest a tactic to drive traffic to external sites, likely for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/pify?keyword=incident+reports+example+software+testing
    • http://files.balibidadaritours.com/uploads/1/3/2/6/132682553/matojezolojobok.pdf
    • http://files.nadermakki.com/uploads/1/3/1/4/131438639/nosumiweweb-wesosejuloviw-sevudagolidif-pawavam.pdf
    • http://files.gracevillepilates.com/uploads/1/3/1/3/131398100/jirebokolidez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34007792176.pdf
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/siwurepikaxeto.pdf
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/advance_care_directive.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/96028775497.pdf
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/kofilesegeduxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/easy_english_grammar_learning.pdf
    • https://cdn.shopify.com/s/files/1/0439/6810/2558/files/ending_sounds_worksheets_for_first_grade.pdf
    • https://cdn.shopify.com/s/files/1/0428/4442/2310/files/61691864344.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/98987860731.pdf
    • https://cdn.shopify.com/s/files/1/0434/7432/1560/files/the_armor_of_god_bible_study.pdf
    • https://cdn.shopify.com/s/files/1/0436/2256/4000/files/35223849084.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4978/files/somusekubasipada.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c07.bin
b1a1e1c07b063237870e25b4812d1f6fbed8e5d216f8bf3bd5965b8e96a374cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C07 5572 bytes
font_01_sfnt_off00007eef.bin
282c919ac6ba0f23aafc3917ade9b15b48ad2ef413a998945151e5d48c3a1425
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EEF 10124 bytes