Malicious PDF — malware analysis report

Static analysis result for SHA-256 4567d22a89678ee9…

MALICIOUS

PDF

45.5 KB Created: 2020-09-10 20:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c298ee1296ed483c9051d73081896323 SHA-1: 742e78afc9845888bcff9df8c29a406b3a3934ae SHA-256: 4567d22a89678ee9094ad6c964ecb7a7174ad73420a8132074023629c3e9e9bb
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify, likely for SEO poisoning. One critical heuristic identified a link to a known malicious redirector, ttraff.link, which is used in conjunction with a lure for 'autograph tamil full movie free'. This suggests the document is designed to trick users into clicking malicious links under the guise of entertainment. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=autograph+tamil+full+movie+free
    • http://wibevire.gillilandhcwildrags.com/uploads/1/3/0/7/130775407/lipetu_mepinu_bebisifuzegivev.pdf
    • http://vagurawu.dianedailydose.com/uploads/1/3/1/0/131071258/e2bb8df.pdf
    • http://files.elitelinesny.com/uploads/1/3/1/6/131606789/ef8865d8d8.pdf
    • http://xuxowar.gk4x4sales.com/uploads/1/3/0/8/130874063/4188400.pdf
    • http://laxewubal.georgiaphilippe.net/uploads/1/3/1/0/131071243/7b3c55963fb.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/xavomos.pdf
    • https://cdn.shopify.com/s/files/1/0468/0712/2071/files/bridal_shower_games_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/nedobaxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1905/9868/files/internal_quality_audit_checklist_template.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/raxebamajoduto.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/80756289858.pdf
    • https://cdn.shopify.com/s/files/1/0431/9631/7845/files/pepazilamibaxaso.pdf
    • https://cdn.shopify.com/s/files/1/0438/7989/1099/files/infrared_spectrometer_chemguide.pdf
    • https://static.usrfiles.com/ugd/575363_dcd88a2671a4406f868b705c7c644dad.pdf
    • https://static.usrfiles.com/ugd/d6af85_b6c943443045495ca63677cd86d6fffc.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_off00005fe8.bin
4fa9b5ae8ad830fdaed1f35f1e5dcb9957e6ed835e535823d31ca47f7ae070e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE8 5184 bytes
font_01_sfnt_off00007173.bin
a80dbaf23c0af89100973da9f7b56d2f6b616fbd51a73de4b68ecda1d666b80a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7173 9956 bytes
font_02_sfnt_off000093b5.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
pdf-font-stream PDF embedded font (sfnt) at offset 0x93B5 16164 bytes