Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d0e8a3a72a2a818…

MALICIOUS

PDF

35.9 KB Created: 2020-08-25 03:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06d5f80ba42100f3a2d6db7234b8b744 SHA-1: 6a24d4d180f37036f05f0a04d77a9a0fe8436e59 SHA-256: 4d0e8a3a72a2a81838e050d0576c863873ba3b3b45e4eded2afa004c02551d1c
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the URL 'https://ttraff.ru/pify?keyword=angkor+wat+pictures', which is flagged as malicious. This suggests the document is designed to lure users to malicious sites.

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=angkor+wat+pictures
    • http://savef.newdundeefireworks.com/uploads/1/3/0/7/130775818/2244229.pdf
    • http://pomeperis.jillsolomonmft.com/uploads/1/3/1/4/131438379/4766609.pdf
    • http://files.primopianostudios.com/uploads/1/3/0/7/130740442/8872717.pdf
    • http://lujanuna.iconiacapital.com/uploads/1/3/1/4/131453133/e98f73031d.pdf
    • http://files.rockyview.studio/uploads/1/3/2/6/132695546/vewoduxuvisorexaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7729/5516/files/12376161183.pdf
    • https://cdn.shopify.com/s/files/1/0440/4117/5190/files/satomi_ishihara_instagram.pdf
    • https://cdn.shopify.com/s/files/1/0457/3210/2310/files/24472752414.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/gaxosevaniwunelovimemu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/autocad_map_3d_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1959/files/fetagopukexoburesasusop.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4503/files/pupizugefisejetogugekujo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7227/5103/files/tetajitikivama.pdf
    • https://cdn.shopify.com/s/files/1/0439/0964/4456/files/kadugedirerisepit.pdf
    • https://cdn.shopify.com/s/files/1/0438/1717/3152/files/fesuzibesuvenomola.pdf
    • https://cdn.shopify.com/s/files/1/0435/5463/5937/files/rafuji.pdf
    • https://cdn.shopify.com/s/files/1/0464/7596/8662/files/12356721086.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_off00004f95.bin
91c5d4e8fcf6ec9076bb7bfcbf7d76323f219a0ee261a2bd35ffad0938a47f61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F95 5216 bytes
font_01_sfnt_off00006177.bin
6bcec3394217d0113c9f775b61a3f0f5a7391d55d6c505130a79324fc478b8a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6177 9744 bytes

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