Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5dd958c479bf37…

MALICIOUS

PDF

37.1 KB Created: 2020-09-21 04:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b832bbadd71b6faa011dfc7a047eae93 SHA-1: c2d4b4b16effa013e2133435dac4b5d6ebde2850 SHA-256: ee5dd958c479bf37c7146d7d9b244cd3172eeca95046fd06737eb998bcfe7dfe
150 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be part of a link farm designed for SEO manipulation. One prominent URL, 'https://ttraff.club/wix?keyword=4th+grade+common+core+math+assessments', suggests a lure to a malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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.club/wix?keyword=4th+grade+common+core+math+assessments
    • http://wugosew.inveruriebowlingclub.com/uploads/1/3/0/7/130775443/870206e8e6.pdf
    • http://pidumixez.envisioncinema.com/uploads/1/3/1/8/131871729/nagonenixipadekito.pdf
    • http://files.getcompletebodybalance.com/uploads/1/3/1/0/131070895/7558312.pdf
    • http://files.sapritalia.com/uploads/1/3/1/0/131070866/ziresarudireti-gamose.pdf
    • http://files.wipeerrunorganizations.org/uploads/1/3/1/4/131452958/kolupupuv-zidusigevivowi-kafud-xofazutoraloti.pdf
    • http://files.dreamwayborzoi.com/uploads/1/3/1/4/131406391/ziwane-gevifokezije.pdf
    • http://rosutod.continuingedhub.com/uploads/1/3/0/8/130874253/noxawuwuxusikaligibu.pdf
    • http://navoda.alexisangels.net/uploads/1/3/2/8/132815176/fokudozejamune_pitimepuzus_tileko_loxawelimudiri.pdf
    • http://dowepe.royalmarineser.com/uploads/1/3/2/6/132696067/73c939504ed6375.pdf
    • http://tugadaxa.nottsu3anetwork.org/uploads/1/3/1/4/131438641/d2b4c0818614c0.pdf
    • http://vivog.vivallbright.com/uploads/1/3/2/7/132740414/2315395.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/38278930531.pdf
    • https://cdn.shopify.com/s/files/1/0438/6262/2358/files/android_move_files_to_sd_card_app.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_off000053d1.bin
0f35668b22902503d02ed155e2373cc677d4b9a3963fbd5652fbbe1c0360467e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53D1 5316 bytes
font_01_sfnt_off000065be.bin
fb32749d72ce5af372d9340a54b2b0b665b0f2837964a71226165977b8b5f6cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65BE 10028 bytes

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