Malicious PDF — malware analysis report

Static analysis result for SHA-256 35150c81de6fc294…

MALICIOUS

PDF

40.9 KB Created: 2020-08-18 15:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7fcb1fe9856e3b179454e3649458cea SHA-1: fb85ba1d214ab6a7193243bfe348eae16ad06d4f SHA-256: 35150c81de6fc29406f710a5e627b5185cd4df7a0a8797af04d81e0ca4d89c08
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a "self certification form hsbc". The PDF also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF with high confidence. No scripts were extracted from this sample.

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.ru/pify?keyword=self+certification+form+hsbc
    • http://rewutu.citybeerruns.com/uploads/1/3/1/3/131380265/9327406.pdf
    • http://files.mindfulvisionaries.com/uploads/1/3/1/1/131163834/tujopufuzi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4660/7765/files/que_es_un_brote_psicotico.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/20414167444.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/vajafexofawixavib.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1142/files/nuvaxazamogapumu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5549/files/queen_size_quilt_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0446/8817/9353/files/ansys_maxwell_3d_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/6187/0743/files/zujakozulufudakisejuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5953/files/53781496369.pdf
    • https://cdn.shopify.com/s/files/1/0429/3473/0911/files/surozoju.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/oxidation_of_primary_alcohols_to_carboxylic_acids.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_off0000633b.bin
f61f6f0ff7b122f149a6185f66b774bfff79f4d15bb48b93f7561bb28f0853d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633B 5364 bytes
font_01_sfnt_off0000753f.bin
f8ad2369144e97da043908fc687d2a7e1f2d402bfb89e898c31403f316515ebc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x753F 10012 bytes

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