Malicious PDF — malware analysis report

Static analysis result for SHA-256 994ac3e308f57137…

MALICIOUS

PDF

46.1 KB Created: 2020-08-16 19:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 973fddfecdd99e1717235ff6354df895 SHA-1: 5f88c797bd4b6c53810809b3b4bfcb1d6808906d SHA-256: 994ac3e308f57137aaa0285bf441f588881b20e7bf8aac862e241e31c7ebe745
150 Risk Score

Malware Insights

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

The PDF contains a direct link to a malicious redirector, ttraff.com, which is part of a link farm designed to distribute malware. The document body mentions 'Sky vpn premium cracked apk', indicating a lure for potentially pirated software. The ML classifier strongly flagged this PDF as malicious. The primary attack vector is likely social engineering via a malicious link embedded within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=sky+vpn+premium+cracked+apk
    • http://dufiwaguw.vterryscience.com/uploads/1/3/1/6/131606490/lagujabu-zuviwaponu-fanadino.pdf
    • http://files.slsareascouts.org/uploads/1/3/0/7/130776151/rodutepekoz.pdf
    • http://raguz.backwaterinc.com/uploads/1/3/0/7/130740596/2449393.pdf
    • https://cdn.shopify.com/s/files/1/0436/9442/4232/files/leraredasoxu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9071/5548/files/lilakudij.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/84207001129.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/bsc_physics_honours_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/6286/0699/files/72363846552.pdf
    • https://cdn.shopify.com/s/files/1/0439/4447/6840/files/gapomajamumo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/short_story_english_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/33084852306.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/bevezuzamo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/35551171229.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_off000061b3.bin
1680e964fcf90dd046e488a9a46984dd0729943143fbf0fe32840e98e3ef657e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B3 5336 bytes
font_01_sfnt_off000073d0.bin
b5ac00fbe205d4af147d246fba457df95a12b948642815cb033e1c7b65415ff0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D0 10016 bytes
font_02_sfnt_off0000964e.bin
fbeccb1482ee56052ed809ec6cb7dfbc577d51b9212e43fffabc93e29761b6bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x964E 16248 bytes

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