Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd311bfbbac65a5…

MALICIOUS

PDF

54.4 KB Created: 2020-08-07 08:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70eea97c82e6584f72330d1c6a48c90a SHA-1: ecbb5f7fae5554e6799dd4f1e82dbe469c368a80 SHA-256: 4bd311bfbbac65a59e2cf97db92709c0b7e18d7e07d05068b941dd11c2cfe557
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same malicious URL. The presence of numerous links suggests a link farm or redirection strategy to obscure the ultimate destination.

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=moment+of+inertia+formula+pdf
    • http://bamejuzag.teachingandlearningnetwork.com/uploads/1/3/0/7/130776644/4452048.pdf
    • http://files.nb-peiponyclub.com/uploads/1/3/1/3/131378942/sidepes_wisago_gotipudopitu_timizesanez.pdf
    • http://files.helpabee.org/uploads/1/3/1/1/131164431/tozapajawozegavopiza.pdf
    • http://files.nycea.org/uploads/1/3/2/6/132681303/putomibosaresa.pdf
    • http://files.alexfullermedia.com/uploads/1/3/2/7/132710676/zanarun.pdf
    • https://cdn.shopify.com/s/files/1/0433/4914/7803/files/bunalonurudufo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/ziwanuxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/raw_till_4_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0434/6452/3926/files/26350436412.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/dawulivuwudanotalawuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/35873057739.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/19287199526.pdf
    • https://cdn.shopify.com/s/files/1/0444/4097/7574/files/saint_row_2_cheat_code_xbox_360.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/initiation_au_bouddhisme_tibtain.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/zofikapok.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_off000076a5.bin
17b01765c495434cb027f55429501260a03f2d079cd370f87cb8039fa10325b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A5 5012 bytes
font_01_sfnt_off000087a7.bin
a668794114361c395e92754529af5d05992831d395c07af92ab89166137e8e05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A7 15516 bytes
font_02_sfnt_off0000b7b7.bin
1396562ca3b520584892f4bd50ff39b0722e014cdbc1625119a677b71e1270af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B7 16064 bytes

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