Malicious PDF — malware analysis report

Static analysis result for SHA-256 8caef6935351b72c…

MALICIOUS

PDF

43.2 KB Created: 2020-08-06 20:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41186a5bdc9b0cb5af75b7070a1af195 SHA-1: d32e5723dfab73c8467c49ed39fb952c8cfe913b SHA-256: 8caef6935351b72c1233dace515125121af46930466183830e91fb8dc661ac3a
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, embedding numerous external PDF links, likely to obscure the malicious redirector. No scripts were extracted, and the PDF structure itself does not indicate specific exploitation techniques beyond redirection.

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=mindray+hematology+analyzer+pdf
    • http://files.buffalobillboycott.com/uploads/1/3/1/6/131637043/wobapujiwubujiluku.pdf
    • http://files.bethcaindesigns.com/uploads/1/3/0/8/130874474/fetumowe-bajoli.pdf
    • http://files.danwickman.com/uploads/1/3/2/8/132815190/c97acde4fd1.pdf
    • https://www.absolutemed.com/
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/jaxopuzaxowagapa.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6835/files/71931990697.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/poweredge_t330_tower_server.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/72570446240.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/89695070255.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/dejutizujazinuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5181/8918/files/rumipedopijo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/badidafobiruvoxuzimis.pdf
    • https://cdn.shopify.com/s/files/1/0437/7251/0362/files/fuzofevumesopozex.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/figitamijelitu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/42052138179.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_off00005de7.bin
8b7fb5f93b9b22de6f110e5012a9c0f64c48a1b7c302bd6c9d45795e6f42bc21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE7 5432 bytes
font_01_sfnt_off00007057.bin
1e18a69b92e5a9191d62eafb6eba80cb48f1d4bc2957fc7aabe4489886c0552b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7057 14796 bytes

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