Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a4f90a647ca2246…

MALICIOUS

PDF

43.7 KB Created: 2020-08-12 19:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bd591a562010f674fb42cec69b07cfa SHA-1: aeb4242c4b4b55f7e5617629462c2a1b37666428 SHA-256: 3a4f90a647ca224693852e0fb35d4155f4ec93421dbe969437f0b1997647ed8f
128 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.ru', identified as a malicious redirector. Additionally, it features a mass of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the malicious destination. The presence of a 'download' call-to-action further supports a malicious intent to trick the user into clicking the link.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bonafide+form+pdf+download
    • http://files.tuftsasce.org/uploads/1/3/1/3/131398292/4937636.pdf
    • http://files.assumptiondads.com/uploads/1/3/0/8/130814169/vunubisodive-siliw-vebulod-pudafofekas.pdf
    • http://jawoni.bathswimtherapy.org.uk/uploads/1/3/1/4/131406149/d4b987fca34fe75.pdf
    • http://files.elainehmacdonald.com/uploads/1/3/0/7/130739916/dajatupapi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2946/2177/files/3670710190.pdf
    • https://cdn.shopify.com/s/files/1/0440/4668/0214/files/laboratory_assistant_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/3008322008.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/nizawoninanux.pdf
    • https://cdn.shopify.com/s/files/1/0431/2370/3969/files/26662365061.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/52453374760.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/84078547466.pdf
    • https://cdn.shopify.com/s/files/1/0448/3137/5521/files/68207010853.pdf
    • https://cdn.shopify.com/s/files/1/0433/8742/0835/files/analogy_test_examples_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/44690171622.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3857/files/5471604211.pdf
    • https://cdn.shopify.com/s/files/1/0430/7704/2325/files/vamaxemunapobipaza.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4687/files/vuluxelor.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/lekaxinalonikoxuxe.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_off000056e3.bin
a160a77197df605b282c359065478e2ec783de03cd6edac15c8bad29d09de5de
pdf-font-stream PDF embedded font (sfnt) at offset 0x56E3 5152 bytes
font_01_sfnt_off00006860.bin
b0d253dc036a35595c6011247f55a44ffa6c37aa8853ef53a195486b36b4d0e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6860 9660 bytes
font_02_sfnt_off0000898e.bin
7475c1a4da247130a53023ed068de4d85f893ce6bf6664265f44593f6ae0b107
pdf-font-stream PDF embedded font (sfnt) at offset 0x898E 6496 bytes