Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8c9592e1e8ffad…

MALICIOUS

PDF

52.8 KB Created: 2020-08-23 14:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cef2b8d9037fd9537345a8294119a47 SHA-1: 794633ce2fee145f94eab33e817995d91a74b766 SHA-256: 2f8c9592e1e8ffadfec833941bcb14e918edcc06b85ce23bbd5eac1a4d5946f5
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, some of which are hosted on benign domains like Shopify but others on unknown domains. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The document body, though heavily obfuscated, contains the target URL, reinforcing the malicious intent.

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.com/pify?keyword=photoshop+shirt+template+psd
    • http://mutozopiw.danawensley.com/uploads/1/3/1/6/131606457/6834412.pdf
    • http://files.cambridgeharriers.com/uploads/1/3/1/4/131437117/wimowuli.pdf
    • http://files.cregmilko.com/uploads/1/3/1/0/131070712/f23f688ef0ec5.pdf
    • http://files.milescollegesportshalloffame.com/uploads/1/3/2/6/132682564/927fa8c8a9.pdf
    • http://bubewisab.bacmethadone.com/uploads/1/3/2/6/132683168/kowewepolox_nupuvij_fivax_pegivusop.pdf
    • https://cdn.shopify.com/s/files/1/0428/2282/8198/files/cbse_maths_book_for_class_4.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/51352153298.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/62791148147.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/64918034633.pdf
    • https://cdn.shopify.com/s/files/1/0437/6304/0408/files/minority_scholarship_verification_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/4469/9288/files/mechanical_universe_conservation_of_energy_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3287/files/jofemewujawalobaxari.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_off00008ff9.bin
8f9be54829e683753c1a23d965f1fdec9e11b8cb0208067d2129b4d29a41f80a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF9 5200 bytes
font_01_sfnt_off0000a178.bin
97159c93d2a8b3f06a9660eb89314e6efe472af23cce3448c4029b9ba7215e64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA178 10712 bytes

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