Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7db0576ea717aaa…

MALICIOUS

PDF

40.0 KB Created: 2020-08-27 20:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdd6f9f25bc6e4ade2132d40c2d07fb4 SHA-1: 3c5e74260de783a6ef53a34776a4a3219d880b92 SHA-256: d7db0576ea717aaaecae15a104d1b9ee0cfb4149eb98e96f2bd3a9cd44f12c36
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL. This suggests the primary goal is to redirect the user to malicious infrastructure. The PDF also contains a large number of embedded links, many pointing to Shopify, which is flagged as a link farm.

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=sliding+closet+door+floor+guide
    • http://xibopa.therossfamilynz.com/uploads/1/3/0/7/130776228/575921.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/28760542024.pdf
    • https://cdn.shopify.com/s/files/1/0430/4466/7553/files/34190566038.pdf
    • https://cdn.shopify.com/s/files/1/0436/4438/7481/files/bissell_proheat_2x_revolution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/tosezijikenurizapilake.pdf
    • https://cdn.shopify.com/s/files/1/0429/9449/9743/files/wojuronigikufamebazu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8975/files/23014091207.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/kumudoji.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/gabamasowajafiworuguj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/87704801803.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_off00006009.bin
508ed62b4984a5b956a36ea08f72ea75a301ac60cae808269bc93b2958780cdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6009 5080 bytes
font_01_sfnt_off00007159.bin
bc9b306cb5c85c2bc54f30347d9aa763f0771fffcf93797fa51031f39795a9f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7159 9932 bytes

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