Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd56eacb570616c…

MALICIOUS

PDF

40.4 KB Created: 2020-08-23 13:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e747671d8222bdd5280e85c99a8813d8 SHA-1: a10888e49efc13f9910298f2d996f5045304a5e7 SHA-256: 1fd56eacb570616c000815b75c71cdf7e3a7bdb64bfaad32511958a99fb1049e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to a 'corporate lawyer resume template' and the malicious URL. The PDF also contains a large number of embedded links, many of which point to Shopify domains, but one of the primary links is to a known malicious redirector. This suggests the document is designed to trick users into clicking the malicious link, likely leading to further malware download or phishing.

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=corporate+lawyer+resume+template
    • http://files.assv4u.com/uploads/1/3/1/4/131453496/d49f6d09e.pdf
    • http://files.dc3cares.org/uploads/1/3/1/3/131383747/toneku_miwuzolu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/72923448462.pdf
    • https://cdn.shopify.com/s/files/1/0463/7717/3147/files/xunexolaxokidodumo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/47010741606.pdf
    • https://cdn.shopify.com/s/files/1/0431/7216/7841/files/acrimony_full_movie_free_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0433/9358/1212/files/lukeferalez.pdf
    • https://cdn.shopify.com/s/files/1/0432/5035/2296/files/torokufikena.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/butumumepivab.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/central_service_technical_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9953/files/tinkle_comics_read_online.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/68577558178.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/careless_whisper_tenor_sax.pdf
    • https://cdn.shopify.com/s/files/1/0436/8115/3177/files/project_on_alternating_current_for_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0430/7150/4537/files/9670059266.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_off00005df5.bin
5a5743e18df66208285dfe7e4cb52f2d145949f0084c444397b25c1778891683		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF5 5064 bytes
font_01_sfnt_off00006f2a.bin
858abfcfe349e5e7e8dd3396109a4d5e34233c42a671b1b82c9fcfe8093cdffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2A 11144 bytes

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