Malicious PDF — malware analysis report

Static analysis result for SHA-256 58882961a4e07bfd…

MALICIOUS

PDF

57.7 KB Created: 2020-08-09 01:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62b04f65ced85248fd53381c44b43e84 SHA-1: fee474a5745f86312639b1cf41b4eb74725c67b3 SHA-256: 58882961a4e07bfdeaa6525916a3fb1a3878f76523a8fd0949ac72a03be5c6d3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same URL as the malicious redirector. The primary attack pattern involves luring users to this malicious site under the guise of providing algebra problems.

Heuristics 3

  • 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.
  • 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=challenging+algebra+problems+pdf
    • http://files.theunbrokenbody.com/uploads/1/3/1/6/131637919/3505331.pdf
    • http://wumezim.motionxsynergy.com/uploads/1/3/2/6/132683188/jevimibej_razer.pdf
    • http://files.wallartandpresents.co.uk/uploads/1/3/1/3/131379761/gedotubuvezu.pdf
    • http://files.bkllc.com/uploads/1/3/0/7/130774962/6791817.pdf
    • http://lupejek.jci-gardena.org/uploads/1/3/2/6/132680813/2489f40d0d4ff.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/77405594445.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/fabox.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/oxidation_of_saturated_hydrocarbons.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/caboolture_train_line_timetable.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.pdf
    • https://cdn.shopify.com/s/files/1/0432/9996/3044/files/sigewebipoduvamogogix.pdf
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/pigix.pdf
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/table_of_contents_markdown.pdf
    • https://cdn.shopify.com/s/files/1/0434/2385/8850/files/1953_ford_jubilee_manual.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_off000099a8.bin
9e50c432b28219798356622d05207b0f090c5f73b504d6efdadad9d0c57e0fb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99A8 5500 bytes
font_01_sfnt_off0000ac22.bin
6e57d13f436bfe5fd152c741d3afe6e99643b06c210757691c257203474ad588		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC22 14268 bytes

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