Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c07fc969cce188e…

MALICIOUS

PDF

41.6 KB Created: 2020-08-23 09:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 536e52009795696babf395945e8475c0 SHA-1: c6673e8e3ac83482903d229b2d7aff5425bd8a78 SHA-256: 1c07fc969cce188e8636ac2d39408b48c37f23f17a15f863e69cd785b33efefe
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=computer+ergonomics+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are hosted on Shopify but point to potentially malicious content. The document body, though heavily obfuscated, contains URLs that are likely part of this link farm. The primary attack vector appears to be social engineering, luring users to a malicious site under the guise of a legitimate document.

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=computer+ergonomics+pdf
    • http://bazej.teamworkexcellence.com/uploads/1/3/1/8/131856408/43be39d32b8a127.pdf
    • http://files.natalieteale.com/uploads/1/3/1/3/131379356/tazapofimeg.pdf
    • http://lomexo.canadabeachsoccer.com/uploads/1/3/2/7/132740718/42c0f402.pdf
    • http://kuted.gowithyourgut.com/uploads/1/3/0/7/130776046/1578773.pdf
    • https://cdn.shopify.com/s/files/1/0448/2102/0834/files/marvel_eternals_comics.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/43281829016.pdf
    • https://cdn.shopify.com/s/files/1/0440/8826/2821/files/58328314802.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9029/files/structure_in_c_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/3349/1616/files/kinile.pdf
    • https://cdn.shopify.com/s/files/1/0434/3808/0166/files/48801084958.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6647/files/study_habits_and_academic_performance_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/72087887084.pdf
    • https://cdn.shopify.com/s/files/1/0450/6550/2872/files/artificial_intelligence_a_modern_approach_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0444/7895/5687/files/63371326946.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_off0000660a.bin
7abaa865df00559528961d1df5c175afa61ae3424c62a616c399ed92e591388a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660A 5136 bytes
font_01_sfnt_off00007774.bin
f07e0e016bec17a16739d4c91b2d1fc87aef24e2a4d3bbded56703c32c66b0f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7774 10120 bytes

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