Malicious PDF — malware analysis report

Static analysis result for SHA-256 261da07f1f512136…

MALICIOUS

PDF

51.7 KB Created: 2020-08-10 17:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fd95e140803420b1a1e54e9d86e9085 SHA-1: 7be494310c3de0ac246a8550045033caaad5ed63 SHA-256: 261da07f1f512136f5880e036e3d96504dc6251cd160e0a14e46142edd5cb9b4
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the text 'Alcoholismo en universitarios mexico pdf' and references 'wkhtmltopdf', suggesting a lure document. The primary malicious activity observed is the redirection to the `ttraff.ru` domain, which is flagged as malicious.

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.ru/pify?keyword=alcoholismo+en+universitarios+mexico+pdf
    • http://witeguwi.ffcdelaware.com/uploads/1/3/0/7/130776445/mumerixidese.pdf
    • http://tofufonu.luludeuxmillinery.com/uploads/1/3/1/0/131069934/bifofet.pdf
    • http://files.sofiamorning.com/uploads/1/3/1/3/131381946/kubujimofot.pdf
    • http://files.journeystoflavors.com/uploads/1/3/0/9/130969555/a18860d033.pdf
    • https://cdn.shopify.com/s/files/1/0439/5106/3195/files/e6_a2_85_e8_8a_b1.pdf
    • https://cdn.shopify.com/s/files/1/0432/6545/8342/files/minecraft_mob_spawn_radius.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/tuzugaxeviwapajoku.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1864/files/minecraft_premium_account_list_2017.pdf
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/zikugeziwokawibevafu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1173/3664/files/69106844203.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46150969179.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40573574370.pdf
    • https://cdn.shopify.com/s/files/1/0436/0978/4482/files/vezumomutuju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gekisemegudifusoledo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/jupogomowexasegazegilew.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_off00007af9.bin
f679371fe013b6f1e84b093bfb5b2c907f71897812d090652bc0cb3510100004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF9 5392 bytes
font_01_sfnt_off00008d1a.bin
0685dbabb0d632320e6e1bae09642bd1f6b4695b58ca06419a14951b6aec5085		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1A 11152 bytes
font_02_sfnt_off0000b19d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB19D 4324 bytes

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