Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d10de8144ac042d…

MALICIOUS

PDF

54.1 KB Created: 2020-08-18 16:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9369261d52f4e7e798cfdf890232ab92 SHA-1: cc133db3c5d41bcabca4e420463d99a55b1ecac2 SHA-256: 4d10de8144ac042de409e9254ac6376dc4173a5b23078c6b07726e88cd335256
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The primary malicious URL is 'https://ttraff.com/pify?keyword=house+drawing+software+free', which is likely intended to redirect the user to a malicious site.

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.com/pify?keyword=house+drawing+software+free
    • http://sunazevud.victimwitness.org/uploads/1/3/1/8/131856772/gotirojob_savadosi_radeso_kowob.pdf
    • http://files.3riversmuseum.com/uploads/1/3/1/3/131383791/ff4afd397.pdf
    • http://files.tomr.eu/uploads/1/3/2/6/132695755/jusigisilak.pdf
    • http://pixivarej.jackiedennison.com/uploads/1/3/0/9/130969300/09bba4cd1.pdf
    • https://cdn.shopify.com/s/files/1/0437/5032/6421/files/arquitetura_bioclimatica_tropical.pdf
    • https://cdn.shopify.com/s/files/1/0439/0833/3736/files/correct_answer_to_a_puzzle_crossword_clue.pdf
    • https://cdn.shopify.com/s/files/1/0447/5689/3847/files/ds2_sunlight_medal.pdf
    • https://cdn.shopify.com/s/files/1/0436/2217/0787/files/29736598368.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/nuwasuguxitudaletonuruko.pdf
    • https://cdn.shopify.com/s/files/1/0434/6803/0102/files/tafsir_sourate_al_mulk.pdf
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/brazilian_portuguese_course.pdf
    • https://cdn.shopify.com/s/files/1/0432/0103/6443/files/psy_gentleman_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/understanding_and_using_english_grammar_4th_edition_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/5988078928.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/
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/nuwasuguxitudaletonuruko

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000096b8.bin
740a5436d5c8d44688c46f593ae176a92f9917ed19f4e2633033c419b0ade85f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96B8 5096 bytes
font_01_sfnt_off0000a82c.bin
1751cb3b76b85670ae96fbfb5bf19aadee5ac9e0bb8683276597da1fcba939cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA82C 10352 bytes

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