Malicious PDF — malware analysis report

Static analysis result for SHA-256 7371ea5afbd1d776…

MALICIOUS

PDF

47.2 KB Created: 2020-08-31 14:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bccf31509c14a6c466f912319b2fcfc3 SHA-1: 5cd9065d8f7c0af52b5f540a69f5519fe3c0b5a4 SHA-256: 7371ea5afbd1d776d7d76385009867ae2c65c507404ca63ef8bb65dba02fadfd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a redirector to malicious infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=guided+tours+of+scotland+from+canada. The document body, though heavily obfuscated, also contains this URL and other links to PDF files, suggesting a link farm or redirection scheme designed to lead users to harmful 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.com/pify?keyword=guided+tours+of+scotland+from+canada
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/8484/1124/files/paxaposemifulidofasevi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/13911513700.pdf
    • https://cdn.shopify.com/s/files/1/0438/5583/9382/files/sonavawamedidisa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4403/5993/files/design_and_analysis_of_algorithms_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/venatore.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/2914327778.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/86975168242.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/negative_prefixes_game.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b45f645a8f446e1a05ee991c4a83db5.pdf
    • https://static.usrfiles.com/ugd/0aab01_c8997a2090514c479f73bdc2fe79c267.pdf
    • https://static.usrfiles.com/ugd/aff7ca_84c49ef6b55b4fe6836df5f861a779c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bd8c060f0054c4aaf48efed9692b423.pdf
    • https://static.usrfiles.com/ugd/b8c837_98ebf3e25d01495c901cd116808cc6a1.pdf
    • https://static.usrfiles.com/ugd/d63aaf_cc42f88ec13f49a8a3df9a8abd40a5bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f4c05d4cd9f4809ad1a8fb468ce694b.pdf
    • https://static.usrfiles.com/ugd/c3f88d_086f73566c1c47c4aac6fcdf478c1dd0.pdf
    • https://static.usrfiles.com/ugd/26481d_997922d406ce4b83ab5316748fcec3b5.pdf
    • https://static.usrfiles.com/ugd/de02f3_bd0636c5a048487087e141a411627e96.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_off00006d30.bin
03c1841819324b29d2edcabd48557835afa5ec4decc658ac0e34142723abc3c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D30 5080 bytes
font_01_sfnt_off00007e58.bin
16d4500a3837e22bc7426f5f927b09ce2d435c8fb56fc746f2aa87714a04690b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E58 10188 bytes
font_02_sfnt_off0000a14c.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA14C 4324 bytes

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