Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d14edc4b230fea…

MALICIOUS

PDF

61.6 KB Created: 2020-08-22 11:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a5ae669291ee9e9d496e876291786d2 SHA-1: b5c76bd3a1f224e30f99f8e6a328a999d0f38369 SHA-256: 81d14edc4b230feab9b62b297301bb41bec34a158d208d2ef7d80d3434c7321d
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely to manipulate search engine results and distribute malicious content. No scripts were extracted from this sample.

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=national+library+of+pakistan+islamabad+membership+form
    • http://files.andywilsonmusic.net/uploads/1/3/0/8/130813985/xuvafaninopoju_ratuwuxenote.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71135401618.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/2285192684.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/jilalapolulijij.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/jawowabazakefo.pdf
    • https://cdn.shopify.com/s/files/1/0438/5865/7430/files/temperature_sean_paul_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/9021/5073/files/mesowaxufovudanu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0731/7912/files/cecil_medicine_25th.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/avast_antivirus_for_windows_7_pc.pdf
    • https://cdn.shopify.com/s/files/1/0447/9077/5965/files/jamb_biology_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/7437/8142/files/wovafivexijixakomajugiwib.pdf
    • https://cdn.shopify.com/s/files/1/0437/0805/5720/files/manual_of_freediving.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_off0000965c.bin
3dd6ab419c206ce11ecb06be42287379f6e33f894a3081c8be7e5be23ac468a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x965C 5556 bytes
font_01_sfnt_off0000a919.bin
8b757573dd44a5ae1bfcb93c4325a19402b5b69bff3db87101c4f8612f258b2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA919 11204 bytes
font_02_sfnt_off0000cf2f.bin
9bb6502ec90f5e39cafa8321719c84a9415bb85551f502c2d9efb77893ae2bf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2F 17284 bytes

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