Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1de54f49ee8a75a…

MALICIOUS

PDF

43.9 KB Created: 2020-07-31 18:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfab3f7f8cefd55819a1e338753e396b SHA-1: 75a85a8583c7eaf3390c65dad11917d8c3bfa704 SHA-256: a1de54f49ee8a75a60dd2b300df65c0150b57abb47c0e79884b8e1e3bbc3af47
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'snipping tool shortcut' which points to ttraff.com. The document also features a large number of embedded links, many of which point to cdn.shopify.com, suggesting a link farm or distribution network. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=snipping+tool+shortcut
    • http://files.travelwithgracegetaways.com/uploads/1/3/1/4/131406800/texelasigidoxitidal.pdf
    • http://files.kloveday.com/uploads/1/3/0/7/130775792/2098070.pdf
    • http://files.algerparkchurch.org/uploads/1/3/2/6/132681749/ee504ebcf4cfa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/wogitisunameka.pdf
    • https://cdn.shopify.com/s/files/1/0428/3206/8775/files/liregaxifadikebe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3959/files/98960332372.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/20645536701.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/35890099843.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5870/files/viwedekezubav.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/wovupuleruwogosed.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/45051227706.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/89477750420.pdf
    • https://cdn.shopify.com/s/files/1/0429/3361/6803/files/kesujavegujawa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1999/2222/files/ramerelevekepuxof.pdf
    • https://cdn.shopify.com/s/files/1/0437/2663/5157/files/87394404581.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/renowunozoxemuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/zomukalotedakoguwotawujub.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/
    • https://cdn.shopify.com/s/files/1/0429/3361/6803/files/kesujaveguj

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000689b.bin
82d08061adeb0e5ccb815044d63f9c667ac0bda89ff79c4dc7d67d9f778780e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689B 5088 bytes
font_01_sfnt_off000079ec.bin
7d33b2df9e36b9ba18e412384fb1be16ab41f33bc370c29ed2f97b3ca1ac020d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79EC 14720 bytes

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