Malicious PDF — malware analysis report

Static analysis result for SHA-256 c24bf09ff2051658…

MALICIOUS

PDF

46.7 KB Created: 2020-08-04 15:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4db4c69ff88b563bd76f1ced86c7d409 SHA-1: f4c6862459921c0d43fe1010f8fda1ec81b39071 SHA-256: c24bf09ff2051658b09ae04ea50df0441c21aa6c623c1b7375590d77e07cab46
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, some of which are benign Shopify URLs. The presence of a 'download button' lure further supports the malicious intent. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary goal is to redirect the user to potentially harmful content.

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/wb?keyword=the%20bloody%20chamber%20the%20company%20of%20wolves%20pdf
    • http://files.herbivoreresearch.com/uploads/1/3/1/4/131453706/mejusax.pdf
    • http://files.goodpug.com/uploads/1/3/0/7/130739419/3e160e05a528d.pdf
    • http://files.offthemapmaryvillealcoa.org/uploads/1/3/2/3/132302876/bopuwagarawudiru.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/81665081605.pdf
    • https://cdn.shopify.com/s/files/1/0432/3554/1151/files/organization_theory_and_design_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/10081147224.pdf
    • https://cdn.shopify.com/s/files/1/0435/0482/8580/files/7_wonders_of_the_world_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0440/5982/0182/files/soundboard_for_vrchat.pdf
    • https://cdn.shopify.com/s/files/1/0428/5592/3878/files/convert_ai_to_jpg.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/midire.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/53080404116.pdf
    • https://cdn.shopify.com/s/files/1/0431/5221/2130/files/small_pro_download_crack.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_off00006a7c.bin
1f9d3f08c563b182baa219c78205dfc670908583df85f8639d06578500d8188c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7C 5476 bytes
font_01_sfnt_off00007d0b.bin
f705928f2ccebdd06a183c863b63aad5cb077a2cbe5da69cfe0bab37693b3641
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0B 10144 bytes
font_02_sfnt_off00009fc4.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC4 4324 bytes