Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ca4addf8bf22ce…

MALICIOUS

PDF

48.2 KB Created: 2020-08-03 22:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17de2ce0fec9c3b378d9c17d29a1728b SHA-1: 0fd25a95d61197c0abb1f92cb15127e00cc511bd SHA-256: 46ca4addf8bf22cee61f168ebb878285c0e1be660c3159c3ba1dd0679bcbace8
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body text, though heavily obfuscated, contains phrases related to application letters and download prompts, suggesting a lure. The primary malicious URL identified is ttraff.ru, which redirects to a potentially harmful site. No scripts were extracted from this sample.

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=sample+application+letter+for+teachers+fresh+graduate+pdf
    • http://files.kennedylayne.com/uploads/1/3/1/4/131454355/8826730.pdf
    • http://files.sam-miee.com/uploads/1/3/0/9/130969075/sabipofudukakosu.pdf
    • http://files.amethystretreatcenter.org/uploads/1/3/1/0/131071157/zaforesudafetanosav.pdf
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/dikevurixuva.pdf
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/free_online_autocad_drawing_to_converter.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/tulukexebedilov.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/61442167159.pdf
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/sukajufiwoxositot.pdf
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/79394897026.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/lumiliwulajidedewis.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/97993560760.pdf
    • https://cdn.shopify.com/s/files/1/0431/5706/1781/files/nevolew.pdf
    • https://cdn.shopify.com/s/files/1/0428/1984/6311/files/28499599795.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7175/files/68292212757.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/gezebaka.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5990/files/627305083.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_off00007063.bin
9008a6fc3ae5ade46c0a904f7e77129ea58556618b6607129a91ed7044875c86
pdf-font-stream PDF embedded font (sfnt) at offset 0x7063 5556 bytes
font_01_sfnt_off00008302.bin
e193517860779bd03e44d1104185553fd5fcb2d6353e10d0e633bd42f54c965f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8302 9944 bytes
font_02_sfnt_off0000a50a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA50A 4324 bytes