Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f5e682eb0cf4369…

MALICIOUS

PDF

52.9 KB Created: 2020-08-22 03:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71b3a24a33e062005bfb9d1ea9465190 SHA-1: 2d40581cd50eb01238365522f2331c873ae3a80f SHA-256: 4f5e682eb0cf43693323c878c2406a065bcfd44d13d528849449e9b07d3552be
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to unknown or potentially malicious domains, including a critical redirector link to 'ttraff.ru'. The document body, though heavily obfuscated, contains this same redirector URL and other PDF links, suggesting an attempt to disguise malicious activity under a lure related to sheet music. The presence of numerous PDF links and a redirector indicates a likely phishing or redirection campaign.

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=female+barbershop+quartet+sheet+music
    • http://wikezopa.bexartspe.org/uploads/1/3/2/8/132814930/vumene.pdf
    • http://kitopeju.mscplastics.com/uploads/1/3/0/9/130969204/welupolalel-zamewurebudasom-ragonubaj-filem.pdf
    • http://files.dongesbaypto.org/uploads/1/3/2/6/132682039/raved-tolevikijoge.pdf
    • http://zerujig.meetplaychill.com/uploads/1/3/0/7/130739430/bokorikajoz.pdf
    • http://lojavu.wiccloutreach.info/uploads/1/3/1/3/131382430/kosemonu_deroni_gefaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3448/files/40197111097.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/26852915701.pdf
    • https://cdn.shopify.com/s/files/1/0438/0885/0081/files/52836316581.pdf
    • https://cdn.shopify.com/s/files/1/0437/9872/4769/files/tumimezuwovaful.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/10th_class_maths_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0435/4729/5898/files/dosowo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/buxonolezas.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/51692153529.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_off0000909f.bin
ead5717f143520d70f950cab212b9efa48327786707cd88bd61dde2423d28d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x909F 5396 bytes
font_01_sfnt_off0000a2d3.bin
4dc605f34ae9977af01d5f1eac489916c541289a6cca129025071240b0aa8d94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2D3 10660 bytes

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