Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7bf1795f26e67c…

MALICIOUS

PDF

39.4 KB Created: 2020-08-18 22:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cdee3c59b160a17a266aa1d52755e22 SHA-1: 4c9edeeafaee68c5fef0f3fd14a2f3b783b54cf6 SHA-256: 8e7bf1795f26e67c343fdc95f528be711df6da5fcff452616a602e0fcc52947a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external websites. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=holt+mcdougal+environmental+science+critical+thinking+answers'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. The presence of numerous links, including those hosted on Shopify, indicates an attempt to create a link farm, likely for SEO manipulation or to distribute malicious content.

Heuristics 3

  • 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.
  • 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=holt+mcdougal+environmental+science+critical+thinking+answers
    • http://files.beaditforwardstore.com/uploads/1/3/0/8/130814397/modosu-tuwesurakeki-digojiba-rudopewematekid.pdf
    • http://jebuleg.priestfamilyfarm.com/uploads/1/3/1/4/131454859/2181060.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/aankh_maare_song_pagalworld_simmba.pdf
    • https://cdn.shopify.com/s/files/1/0432/0398/5570/files/to_the_lighthouse_stream_of_consciousness.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3834/files/vubegopunege.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8453/files/tidulevivex.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/immersive_wenches_sse.pdf
    • https://cdn.shopify.com/s/files/1/0433/8355/4202/files/bal_gangadhar_tilak_essay_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/cereal_science_and_technology.pdf
    • https://cdn.shopify.com/s/files/1/0430/5721/7693/files/63885558958.pdf
    • https://cdn.shopify.com/s/files/1/0437/4308/4705/files/eu_whistleblowing_directive_2020.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_off00004d8e.bin
a62de6cdf796ed3c5764a73cea61be9a15296363cc09e6c1d1749d0b929981a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D8E 5412 bytes
font_01_sfnt_off00005fce.bin
b3334af224bc389927a59e34ec7c44d49e223fdc6a7af10411eefab46d20ef1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCE 10224 bytes
font_02_sfnt_off0000827c.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x827C 4324 bytes

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