Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1984d4b4c21555…

MALICIOUS

PDF

44.3 KB Created: 2020-09-21 19:36:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ea1f53796cf0982d6178976240ec174 SHA-1: d4dca93277713c142ce404b2496377b37e482295 SHA-256: 9d1984d4b4c21555c0656e38fa3e6c4314da33235e70f7062386d24ac7c48bba
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links disguised as a physics worksheet, with one link pointing to a known malicious redirector. The document body also contains a URL that appears to be part of the lure. The presence of numerous PDF links suggests a link farm designed to manipulate search engine results or distribute malicious content.

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.link/wix?keyword=vector+physics+worksheet+pdf
    • http://monupaxot.derekdbass.com/uploads/1/3/1/4/131438044/luwimexalawe-nekovubomol.pdf
    • http://files.jennifermclayton.com/uploads/1/3/0/7/130738753/nadaxoturofizopi.pdf
    • http://files.huraitimana.com/uploads/1/3/1/8/131871864/pigenuv.pdf
    • http://files.leicesterinsight.co.uk/uploads/1/3/1/0/131070718/2097861.pdf
    • http://zulipetij.atyourservicelimosjax.com/uploads/1/3/2/6/132695569/kujim.pdf
    • http://nuwogod.tren.net/uploads/1/3/1/4/131437208/nelofesunuvude-kaguzisud-tuzedusubomeba.pdf
    • http://files.kelwoodyoga.com/uploads/1/3/2/7/132740545/50f5c51504.pdf
    • http://diwuxikid.camdenspeedwaytn.com/uploads/1/3/1/1/131164066/143da60.pdf
    • http://files.newimage.net.au/uploads/1/3/1/4/131453605/d3acb2bcf499dd.pdf
    • http://files.mattiegraceboutique.com/uploads/1/3/1/0/131070561/f1a5ba233d.pdf
    • http://wixirajuw.taxesrussxm.com/uploads/1/3/0/7/130776541/7a5d615.pdf
    • http://files.speedunltd.com/uploads/1/3/1/3/131398188/zepogudages.pdf
    • http://files.amselectric.com/uploads/1/3/1/3/131379134/topagijoxod.pdf
    • http://files.therazorandshear.com/uploads/1/3/1/4/131452803/wizuxuvisofi_xokasimesu_mutudugurituj_fitetikikipib.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/gupog.pdf
    • https://cdn.shopify.com/s/files/1/0462/2211/4970/files/jafutavumapewemituxila.pdf
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/gif_from_youtube_video.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_off00006e46.bin
aee3d12790b78c2e443a9543c37a4d23a6c21bc92ea5183c0fde8d904fa2b493		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E46 5224 bytes
font_01_sfnt_off00008028.bin
27a6d186ace8b8e227ee51e2a0f05dd422344341e926a2354b5159d8a37087d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8028 10544 bytes

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