Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a6a0c6364b0095…

MALICIOUS

PDF

44.6 KB Created: 2020-08-10 12:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0f412803f9df19954498859249a07be SHA-1: 5571b082f7528eafe80d5c89ef89b2a1a3ebd9f1 SHA-256: c8a6a0c6364b00952fb99ca3c1100b1d19b626efa1bd53f777bcf8bf5a42fd6f
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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=umbrella+academy+comic+1+pdf
    • http://files.integritydetailcookeville.com/uploads/1/3/1/6/131636941/5aaf03.pdf
    • http://zurawo.saltcitydozen.com/uploads/1/3/0/8/130814297/nugovugekewer_jupipupipotiji.pdf
    • http://files.fearlesscounselingservices.com/uploads/1/3/0/8/130874276/pogetinex.pdf
    • http://files.midnightriderbrts.org/uploads/1/3/1/8/131856285/wikujukoj-tiraxiseru-sumimixugi.pdf
    • http://files.littlesharkandco.com/uploads/1/3/0/9/130969185/561f17d4005e0.pdf
    • https://cdn.shopify.com/s/files/1/0434/7972/8281/files/59544111840.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4705/files/14363269835.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/98613719581.pdf
    • https://cdn.shopify.com/s/files/1/0438/4532/0861/files/lozemazowukapupuvopoj.pdf
    • https://cdn.shopify.com/s/files/1/0438/5911/6182/files/small_bowel_obstruction_radiology.pdf
    • https://cdn.shopify.com/s/files/1/0440/3943/8501/files/celi_3_prove_d_esame.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2245/files/89450628295.pdf
    • https://cdn.shopify.com/s/files/1/0439/9919/9390/files/princess_diaries_3_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6993/1673/files/12424462708.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/69353785891.pdf
    • https://cdn.shopify.com/s/files/1/0437/1618/2184/files/cartographies_of_diaspora_avtar_brah.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_off00006f99.bin
c03fdd77edd95ea09db6d89f92447febb3b52a0c09c113132015ff3834d5602a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F99 5408 bytes
font_01_sfnt_off000081f2.bin
87580ee44eb4a1587bcad472cb0240c64479f2cb14643f5f31d71a3a00e97ede		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81F2 10536 bytes

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