Malicious PDF — malware analysis report

Static analysis result for SHA-256 51e249c9d9f1345b…

MALICIOUS

PDF

47.3 KB Created: 2020-08-30 04:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38e2ffd5b61e346ef8c462219a6c0da9 SHA-1: 544de14aa1194e0cbd146c018113652770f941fb SHA-256: 51e249c9d9f1345b1713c0b2c8f5edd9b6e7fd8edb17674cfa5035f6f3c78402
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and references to 'Tomb Raider: The Last Revelation', likely a lure. The PDF also exhibits characteristics of a link farm, with numerous links to Shopify-hosted PDFs, one of which is also listed as an IOC. The ML classifier strongly indicates maliciousness.

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/wix?keyword=tomb+raider%253A+the+last+revelation
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/fuwekotoritejo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6620/3029/files/o_reilly_python_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/sijowukibifudalebu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/80477597776.pdf
    • https://cdn.shopify.com/s/files/1/0436/0346/0259/files/cheeni_kum_video_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0447/7770/1533/files/suxisuwalanusaseb.pdf
    • https://cdn.shopify.com/s/files/1/0437/4413/3281/files/bilaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/9273/8201/files/58244642895.pdf
    • https://cdn.shopify.com/s/files/1/0431/5057/3724/files/macklemore_the_heist_zip.pdf
    • https://cdn.shopify.com/s/files/1/0446/9565/0457/files/78337756032.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8864/files/juteturosoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/2257/1930/files/56882144509.pdf
    • https://cdn.shopify.com/s/files/1/0431/7488/7590/files/64611111353.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/50228284161.pdf
    • https://static.usrfiles.com/ugd/9c43ec_6b0377383bba42d0b8dedd34ba353c7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_38da5f077bf24faa8bbbeff4e404c8ab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e8e.bin
5edc89a8235dcc74bc02f0e0f3c187bac5bdab3e272cd1f25f6400453e5a307a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8E 5052 bytes
font_01_sfnt_off00007f8c.bin
8053095e5bcf2fc196eefd4624a1ad428c83bb5e70646e64502598bcffaaae37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8C 10140 bytes
font_02_sfnt_off0000a240.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA240 4324 bytes

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