Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0774611b69226cc…

MALICIOUS

PDF

40.6 KB Created: 2020-07-29 12:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebbf42e274003535f96b8c2d86d6ee50 SHA-1: a55223b14a04d281d5732b1dd0b5d98f99e7177d SHA-256: e0774611b69226ccc7f52f8350cbff559463a3bfca54078499fb0a91ae5c2f41
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify-hosted PDF files. One critical heuristic identified a link to a known malicious redirector, ttraff.com, suggesting a phishing or malicious redirection attempt. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated, preventing a clear understanding of its direct user-facing content, but the link farm and redirector are strong indicators of malicious intent.

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=autocad+2d+3d+drawing+pdf
    • http://files.cbdreleafcenterprovidence.com/uploads/1/3/1/4/131411688/vavezolumin.pdf
    • http://files.mrs-lab.com/uploads/1/3/2/8/132815172/0a7fb2.pdf
    • http://files.bladescollectibles.com/uploads/1/3/1/8/131856200/divelil.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5509/files/38984481072.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4470/files/luweruzexodab.pdf
    • https://cdn.shopify.com/s/files/1/0434/9712/8088/files/67076000840.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6058/files/biluxeke.pdf
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/27812165615.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/28368245457.pdf
    • https://cdn.shopify.com/s/files/1/0428/1656/9500/files/69318582797.pdf
    • https://cdn.shopify.com/s/files/1/0432/9963/5355/files/wabimagetobizatofevuzo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56317886700.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2277/files/57191283122.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/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006175.bin
150f412ced6d8038f2ba81cd790e27b263ab06088215f41afa564533f0aa0ecf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6175 5256 bytes
font_01_sfnt_off00007370.bin
078b86b204f8147890bd3b86b0e052c09f03e20a942b5f8d359b4a3836591ca8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7370 10000 bytes