Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cef50ef95b0294d…

MALICIOUS

PDF

45.4 KB Created: 2020-08-31 03:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9d55ca09b60ebe890d17ce377e19ce3 SHA-1: 7fc70c6331b78127082f9bc3c3ce4dcb05ec7339 SHA-256: 1cef50ef95b0294d4fdf03f70b2823a68acca8b090e3bac9f70cc438d7d424b3
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier as malicious and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body and embedded artifacts suggest it is a lure, likely for phishing, with the primary malicious URL being https://ttraff.ru/wix?keyword=california+tide+pool+guide. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm used for SEO poisoning or to host further malicious 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.ru/wix?keyword=california+tide+pool+guide
    • https://cdn.shopify.com/s/files/1/0430/2949/5959/files/92265582199.pdf
    • https://cdn.shopify.com/s/files/1/0434/2785/6536/files/lamefuxoxidokuputusogagi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2771/files/luxonuzeruwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4670/7104/files/68827034362.pdf
    • https://cdn.shopify.com/s/files/1/0437/6127/0935/files/glencoe_health_textbook_2007.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/risd_acceptance_rate.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/73615391059.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7975/files/lonabomepuda.pdf
    • https://cdn.shopify.com/s/files/1/0437/0133/8266/files/beginners_guide_to_meditation.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1586/files/48016770397.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7815/files/sirapu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/bavuma.pdf
    • https://cdn.shopify.com/s/files/1/0466/6500/7269/files/fidudurejamakipogoxodi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9242/7430/files/battle_cats_uber_rare_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3547/5624/files/gigikadivoxabodumevev.pdf
    • https://cdn.shopify.com/s/files/1/0430/3673/7699/files/automobile_body_parts.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/46276761833.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000676d.bin
55c0a028fb56ce9935d51372217b5d4984986da7eaf9374ca25bbb2dffafb997		 pdf-font-stream PDF embedded font (sfnt) at offset 0x676D 4936 bytes
font_01_sfnt_off00007844.bin
052ee8c4baddacb30bf0cea1cac774a3a2a81f0051aa971ee6bb52943062846a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7844 9948 bytes
font_02_sfnt_off00009a67.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A67 4324 bytes

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