Malicious PDF — malware analysis report

Static analysis result for SHA-256 970872f71c5a5bfb…

MALICIOUS

PDF

42.9 KB Created: 2020-08-06 08:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2f0a3a4b233e8e8107b3541a58e25ae SHA-1: 3a10ce4640d8b52d869ca45b623886b8cf89fca9 SHA-256: 970872f71c5a5bfb19f68ad5f358482d751670995ab937f301f743a99687bc9f
130 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.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on 'cdn.shopify.com'. The presence of a 'download button' heuristic further supports the lure mechanism. The document body, though heavily obfuscated, contains the malicious redirector URL and several benign-looking Shopify URLs, likely part of the link farm.

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=download+pdf+file+from+url+in+php
    • http://files.cnct.ca/uploads/1/3/0/7/130776847/fevubutigoriwoba.pdf
    • http://files.levelupperformancept.com/uploads/1/3/0/7/130739773/rutatoso.pdf
    • http://files.erainnawinnett.com/uploads/1/3/1/3/131398555/sijis.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/88462092781.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/49482842077.pdf
    • https://cdn.shopify.com/s/files/1/0429/5547/3059/files/gajudogavisulugupus.pdf
    • https://cdn.shopify.com/s/files/1/0428/3462/4679/files/62655281139.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5286/files/22211735593.pdf
    • https://cdn.shopify.com/s/files/1/0438/9765/1352/files/88099516114.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/6331489442.pdf
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/zegezedomanu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/gojafaruvupikaravopepuwor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/nexemejirepusekubamenuvo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8714/2819/files/36919009496.pdf
    • https://cdn.shopify.com/s/files/1/0430/0741/0329/files/74214565169.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45484104345.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_off00006a29.bin
fbb825cd21f3fd39be514604ab2eb084a66a9544874773d3add954251a8deaa3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A29 5192 bytes
font_01_sfnt_off00007bc1.bin
1b51b5fa1c60f687ecb64cb6ed2ba9f9d200220e010531d6577de01e4e93461e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC1 10084 bytes