Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7e25dbdeb4e3d0…

MALICIOUS

PDF

53.4 KB Created: 2020-08-02 11:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8eee8c0460fa12ea8e2348ec1179af6 SHA-1: d92936063c5e0225d9cbe890d02fecb8f5b35894 SHA-256: 2e7e25dbdeb4e3d07c3c7670a4c75b40984c217d9ad06498050b1df667eb79f8
152 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=hexadecimal+to+decimal+transparent', which is likely the primary malicious payload delivery mechanism. The file also contains a large number of links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=hexadecimal+to+decimal+transparent
    • http://files.treasurecoaststrings.com/uploads/1/3/0/8/130873875/bepotal.pdf
    • http://files.creatify.media/uploads/1/3/0/8/130873735/6967395.pdf
    • http://files.sw-jet.com/uploads/1/3/1/1/131164425/5820797.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/34157731756.pdf
    • https://cdn.shopify.com/s/files/1/0434/2428/4824/files/51912478884.pdf
    • https://cdn.shopify.com/s/files/1/0437/2476/7400/files/larimomiwul.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/jozibozemexo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9419/4843/files/xuvisemajowesuzirozer.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/11683322640.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/90837225201.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/10433132188.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/33991526731.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/zuramaxuradimotawasuvil.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/76678127336.pdf
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/jotololigib.pdf
    • https://cdn.shopify.com/s/files/1/0434/4479/7606/files/33270237768.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/ranged_attack_disadvantage_5e.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000686f.bin
746cda19d0a45b0d6108c63ff8192b2f88c2fff5e5937e692a7cb04b31166607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686F 6588 bytes
font_01_sfnt_off000078e9.bin
c4ddbe75f651f8ff6cab16847d1159e1fceb7ce703f6feca877748916f19c199		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E9 5248 bytes
font_02_sfnt_off00008aa0.bin
b9711230127e3c54cfe153284ce5b4209c78dcb1668dc1b61fe0d83b0b450f28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA0 4644 bytes
font_03_sfnt_off00009c33.bin
4b23128f96eb8ec9c08cd4fe04e7d49a21a149203ee7144792a604c6639d5260		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C33 10468 bytes
font_04_sfnt_off0000bfeb.bin
f27f1dab863be407bc80ce69f069aaa000ada345c50a5fba1d6b915b5f603bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFEB 1736 bytes

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