Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2564ac4fe9b5ce7…

MALICIOUS

PDF

55.3 KB Created: 2020-07-31 09:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2873b33d986cbbae3afeb59cf30f1f1 SHA-1: b2b06939f4661b225d52083cf8f03a607b105ae1 SHA-256: f2564ac4fe9b5ce7ad6f1fa19a9c2b39991c39b5616814a979931c68c7e34c52
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=cellulitis+management+pdf'. Additionally, it features a link farm with numerous PDF links, including one hosted on 'cdn.shopify.com'. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic suggests a lure to trick the user into clicking the malicious link, likely to download a second-stage payload.

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=cellulitis+management+pdf
    • http://files.greaterlifeheritage.com/uploads/1/3/0/9/130969428/nesujulakidi.pdf
    • http://files.christophersusak.com/uploads/1/3/1/8/131872087/zudawudul.pdf
    • http://files.fredmealiaphotography.com/uploads/1/3/0/8/130813630/bavape.pdf
    • http://files.caressasiu.com/uploads/1/3/0/8/130814631/c984b07.pdf
    • http://files.cbcustomflyrods.com/uploads/1/3/1/4/131406807/xamuvuvusuxu-xatizalujoxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/25705798602.pdf
    • https://cdn.shopify.com/s/files/1/0434/0930/9848/files/dimitekitakolese.pdf
    • https://cdn.shopify.com/s/files/1/0429/9292/6883/files/85751757856.pdf
    • https://cdn.shopify.com/s/files/1/0437/1673/9222/files/67470720242.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/2678855990.pdf
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/19359141406.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/teberesevojuzobunikomami.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1660/files/85512951605.pdf
    • https://cdn.shopify.com/s/files/1/0429/5688/2086/files/kexaxiwadobejememofisa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8476/6620/files/rumavulajogapenibudexuwew.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/45513005218.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/rugemawapez.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_off00009bf1.bin
01f5be52baddb42337cf4838bf2e4f734032a795c2381d423e92e33737ee2538
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BF1 5060 bytes
font_01_sfnt_off0000ad0f.bin
d0414152c56400503e7ec58403d22845f88e8cfe8853f99ab66803b34cad88ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD0F 10180 bytes