Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3edf71d83359f14…

MALICIOUS

PDF

40.7 KB Created: 2020-08-22 17:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0316ad21885e2e25ee1c6d3a977c77d2 SHA-1: 43ee777c3944198e596a56da5ae3e12c43f7671f SHA-256: f3edf71d83359f1499008ccf7be684c248b8b64a635a3912b65cbc07da723a7b
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO link farms and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=agrifood+tech+investing+report'. The document body also contains a visible call-to-action phrase, further suggesting a lure to click the malicious link. The presence of many Shopify-hosted PDF links, while individually benign, contributes to the overall link farm characteristic.

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=agrifood+tech+investing+report
    • http://files.liubaojun.org/uploads/1/3/0/7/130775429/xexobad.pdf
    • http://numadavo.gaprx340b.com/uploads/1/3/0/8/130814674/pusefujejuvabe-nalokaz-xabefojovibumuj.pdf
    • http://xetikadit.jimramsburg.com/uploads/1/3/1/6/131636612/vizinegozemi_vitivadotuxa_vefeninari_tejawesizakiw.pdf
    • http://files.mrjennings.org/uploads/1/3/2/6/132681479/631738.pdf
    • http://futika.ginacampbellemdr.com/uploads/1/3/0/8/130873995/fapekananu_lolusexa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/32318349227.pdf
    • https://cdn.shopify.com/s/files/1/0440/1361/7302/files/agnisakshi_telugu_serial_love_song.pdf
    • https://cdn.shopify.com/s/files/1/0435/9559/5938/files/kivoxodinesupexefafutiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/lopufirupikukamomiragi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7660/7390/files/osrs_guilded_altar.pdf
    • https://cdn.shopify.com/s/files/1/0437/8014/5313/files/95220947902.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57727452667.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_off00006011.bin
ff40e5598a386d0a33d990502d7ed8fd339bc5620260b00dec9d3ba9cf6b5e6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6011 5224 bytes
font_01_sfnt_off000071d9.bin
3bc03e1c19235b096cade5c6d6b6584339aa87c7f0b2cf45b3d154092faff8cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D9 10772 bytes

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