Malicious PDF — malware analysis report

Static analysis result for SHA-256 988207e081e4ca6e…

MALICIOUS

PDF

42.0 KB Created: 2020-08-06 01:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15d69966fad9d2f1356ace02f9a0c657 SHA-1: 8ed883606201e9a327b6d4486d61522eaa67fe8d SHA-256: 988207e081e4ca6e5f7be85b1a5e578a9561c05826e22ecc4b41a31256e0e20b
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=badiou+in+praise+of+love+pdf'. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting a link farm or redirection tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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/pify?keyword=badiou+in+praise+of+love+pdf
    • http://wugodad.randolphks.com/uploads/1/3/1/4/131406437/6873830.pdf
    • http://mowowa.in-touch.org/uploads/1/3/1/3/131383651/nagab-tasusuposep-jexivasuj-jijukuxirog.pdf
    • http://zofugame.friendsontheblock.com/uploads/1/3/1/6/131637309/zafov.pdf
    • http://jejipugi.vibrantabasolutions.com/uploads/1/3/0/8/130813420/boputumi-besubipusutanal-mimizosutos-xopapodu.pdf
    • http://files.retreataberdeenshire.com/uploads/1/3/0/7/130776069/xisaj-vuxufa-zudenizifuzix-kidixepozoro.pdf
    • https://cdn.shopify.com/s/files/1/0432/0631/2098/files/malones_staffing_somerset_ky.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/jotimiwugapobuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/wojokewetozanesero.pdf
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/30627521236.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/5793360466.pdf
    • https://cdn.shopify.com/s/files/1/0438/2933/0077/files/vedoxafufewevagokoseramuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/16414333372.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/81441511115.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/kupiganivukiweme.pdf
    • https://cdn.shopify.com/s/files/1/0432/0490/3067/files/87957889922.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4190/files/convert_image_to_base64_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/zenubezegafo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/alt_code_for_bullet_point.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_off000068fe.bin
2c3d4d25231cd96f5ed0b1acfab3db284c9b6a472d36a2b26323c4a40bd07b1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68FE 5144 bytes
font_01_sfnt_off00007a97.bin
44f9c7a11877a11fc7e2d187c00203fa539a95522ebd7921e23e1b57b6b85523		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A97 9572 bytes

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