Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb192d12253ecf43…

MALICIOUS

PDF

76.1 KB Created: 2020-08-07 05:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c52525cc4fd9e5d5b81ab3873d60833d SHA-1: 785f80864b8198f08f25101a577c455ebe8f0cba SHA-256: fb192d12253ecf43c0aaf270dfd4d87faef45c3961f351f6ac70d3d2738d77c9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=agglomeration+of+iron+ore+pdf'. This URL is likely used to redirect users to a malicious site. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=agglomeration+of+iron+ore+pdf
    • http://files.eo9066.com/uploads/1/3/1/3/131383424/6831557.pdf
    • http://files.moirajo.com/uploads/1/3/2/7/132710655/6052939.pdf
    • http://koreduxub.hhkhsa.org/uploads/1/3/0/7/130776326/52d8d.pdf
    • http://files.bethanyclarephotography.com.au/uploads/1/3/2/6/132696500/2257794.pdf
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/22029623410.pdf
    • https://cdn.shopify.com/s/files/1/0438/2900/2390/files/87362576004.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/vesesafema.pdf
    • https://cdn.shopify.com/s/files/1/0437/3938/1912/files/vusemezojep.pdf
    • https://cdn.shopify.com/s/files/1/0435/0581/1608/files/36470153925.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0434/0432/9125/files/79297162060.pdf
    • https://cdn.shopify.com/s/files/1/0431/2740/6746/files/came_here_for_love_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/faliwerab.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5149/files/zisadomaxuwifuxutod.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/5990/files/jovepi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/71252674233.pdf
    • https://cdn.shopify.com/s/files/1/0434/0337/8839/files/71146050016.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/7608878986.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_off0000e1f7.bin
3ad8c367ae2541aaaf9fba152e271f1253ab8f08a94a6ffd507b84df3bf90b87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F7 5172 bytes
font_01_sfnt_off0000f37c.bin
6b49d3d737512f2cddf17cf2114966b89e2ad77e6e2846173d9094be1022f23d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF37C 15068 bytes

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