Malicious PDF — malware analysis report

Static analysis result for SHA-256 031e5fa89230de63…

MALICIOUS

PDF

51.6 KB Created: 2020-08-01 04:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fa5831cfabca910c059e467890ba09f SHA-1: ecf5b2389581d6edb8aaa37381ea26cbb9525e97 SHA-256: 031e5fa89230de63a29a25c9d8ef533a7d9c4a706b04ea34e5845393d6b4853e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body also contains this URL and numerous other links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link strongly indicate an attempt to lure the user to a malicious site.

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/pify?keyword=tales+of+vesperia+side+quests
    • http://files.douglasshaunephotography.com/uploads/1/3/2/7/132740480/kezijajavolugel.pdf
    • http://files.yoyojake.com/uploads/1/3/1/3/131379049/finekuzir-ganavulutosili.pdf
    • http://files.southernstaraccounting.com/uploads/1/3/1/8/131871864/3998487.pdf
    • http://files.mccathranpianostudio.com/uploads/1/3/0/7/130775557/veminegedu.pdf
    • http://files.valleyliberator.com/uploads/1/3/1/6/131606035/padavosagog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/kafiduvosojapi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6805/files/2577322566.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/83281237872.pdf
    • https://cdn.shopify.com/s/files/1/0440/7800/6437/files/53._544_113._490.pdf
    • https://cdn.shopify.com/s/files/1/0434/3411/5233/files/worakuvitugosurefemux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fokadexowigexavutezirero.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2533/files/89527443658.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8217/files/12673114540.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/mizagokoxuxaze.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nujogopuju.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2280/files/80180480434.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/22385141328.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007270.bin
99cab685fba7929839173470711d95d6316cca6716180c4d956d0a1974ab48be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7270 5688 bytes
font_01_sfnt_off00008631.bin
0d49d4bc2909645b4e24e5314dd77a67735cd2b13e83c6e508720fa970c2c9e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8631 5168 bytes
font_02_sfnt_off000097db.bin
a355e78b04e55d692060f36e443abf6bd1fd052292de6514c2ff51dbd75a29d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97DB 12928 bytes

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