Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7da5d21bdf95da9…

MALICIOUS

PDF

50.1 KB Created: 2020-08-22 00:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a5f881d2b68dc90d39ea08659181acb SHA-1: 987223f84fd1cbaa950e3a66ff3a17962b8058a0 SHA-256: f7da5d21bdf95da9b9775faebbfb00d6e499b0ad09218f8e8d9900cbad9a26a4
120 Risk Score

Malware Insights

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

The PDF file exhibits malicious behavior through its inclusion of a link farm. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that a primary URL leads to known malicious redirector infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic reveals a large number of external links, many hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute content through a wide network. The primary malicious URL identified is https://ttraff.com/pify?keyword=voltdb+vs+mysql+performance.

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=voltdb+vs+mysql+performance
    • http://files.fulltiltk9training.org/uploads/1/3/2/7/132712080/tidimageradilemawa.pdf
    • http://mugena.suttoncommunitycouncil.com/uploads/1/3/1/3/131379866/6999706.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/99157864810.pdf
    • https://cdn.shopify.com/s/files/1/0440/7354/9974/files/60784285289.pdf
    • https://cdn.shopify.com/s/files/1/0437/2611/0885/files/zenexezawagatogiredewutib.pdf
    • https://cdn.shopify.com/s/files/1/0435/3861/2378/files/herbivore_carnivore_omnivore_worksheet_2nd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6703/files/dewibiludejokag.pdf
    • https://cdn.shopify.com/s/files/1/0438/9899/4856/files/letisuwubevasijewel.pdf
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/difference_between_transportation_and_assignment_problem.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/75329685858.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/59303410392.pdf
    • https://cdn.shopify.com/s/files/1/0433/4803/3689/files/82320728938.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_off000077ed.bin
9382c948ac87424a12e3e650364050cfd74e3ebb2d873c9cffb6e6e17f681f7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77ED 5436 bytes
font_01_sfnt_off00008a57.bin
a440f464f583f22683b075911c77b9514936f44ae4468aa6751e58d8734d60c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A57 10304 bytes
font_02_sfnt_off0000ad81.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD81 4324 bytes

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