Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a9faf00b07b5db…

MALICIOUS

PDF

42.7 KB Created: 2020-10-27 05:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 123557fda3d62e4c91d49c2cd88eea18 SHA-1: 53bc56ebdbfd2313a09275d8aa2ecca6dad4e953 SHA-256: 89a9faf00b07b5db160609905f5268e93a7398c3cca5136c90b0008b53caf1b6
94 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of the malicious URL within the document body strongly suggests an attempt to lure the user to a harmful site, likely for phishing or malware delivery.

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.
  • 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://ggtraff.ru/123?keyword=white+mountain+ice+cream+maker+motor+problems
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/c402440279abe.pdf
    • https://jatasurow.weebly.com/uploads/1/3/4/3/134358583/4dd5953.pdf
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f878adf8cd75.pdf
    • https://cdn-cms.f-static.net/uploads/4383475/normal_5f9640701759f.pdf
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5f89d8f013beb.pdf
    • https://cdn-cms.f-static.net/uploads/4387040/normal_5f8fb2fec928c.pdf
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f870db5a93cd.pdf
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f978e1b659b1.pdf
    • https://cdn-cms.f-static.net/uploads/4371265/normal_5f962cca0c410.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0470/9525/1102/files/rujixifeviniguxosafu.pdf
    • https://cdn.shopify.com/s/files/1/0436/7394/4217/files/biographical_sketch_example_for_elementary_students.pdf
    • https://cdn.shopify.com/s/files/1/0432/2403/9592/files/26369573299.pdf
    • https://cdn.shopify.com/s/files/1/0437/0153/4873/files/73375866237.pdf
    • https://uploads.strikinglycdn.com/files/3bb01e16-b59f-41f7-89e3-5e7fa63843c6/18516094770.pdf
    • https://uploads.strikinglycdn.com/files/90dcfaaf-ad58-48cd-84a5-6082d1448eee/74762998396.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4830/files/vililute.pdf
    • https://cdn.shopify.com/s/files/1/0504/6186/8192/files/ruvebaterenesibiw.pdf
    • https://cdn.shopify.com/s/files/1/0482/4763/6122/files/peugeot_partner_tepee_2020_manual.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_off000067bb.bin
a4bf1f73b9c9c2d775c8a5530687f8bf5078e684477d639fb969224a3173d024
pdf-font-stream PDF embedded font (sfnt) at offset 0x67BB 5392 bytes
font_01_sfnt_off000079eb.bin
12060567e56adc15cf3f7f698453ad8be57ba1e57b20a233334aa30fc73fd704
pdf-font-stream PDF embedded font (sfnt) at offset 0x79EB 10396 bytes