Malicious PDF — malware analysis report

Static analysis result for SHA-256 51e98885bb696f32…

MALICIOUS

PDF

46.9 KB Created: 2020-08-17 17:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 459c416a3ab0e5ac0de98e07fde64bd7 SHA-1: a42129aab5a3d77dfb0781fe242c4b971aa69448 SHA-256: 51e98885bb696f324623d4ef5e54e5041c3a8816d2e2189ee88ed9ba5dfd39e3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=broken+angel+lyrics+mp4'. Another critical heuristic flagged the document as a PDF SEO link farm due to the mass of external PDF links. The document body itself is heavily obfuscated but contains the same malicious URL and numerous benign-looking Shopify URLs, likely part of the link farm.

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=broken+angel+lyrics+mp4
    • http://xirarak.adriancoxart.com/uploads/1/3/1/8/131872155/woxefigazog.pdf
    • http://bofuna.mychangingthenarrative.com/uploads/1/3/1/3/131383314/firotobabebazidakeg.pdf
    • http://files.macpainter.com/uploads/1/3/1/3/131381946/a6a78dd1e17a39.pdf
    • http://jinawupi.njlimotaxicab.com/uploads/1/3/1/1/131164456/a77699304ced335.pdf
    • http://migumavi.alessandrosaini.com/uploads/1/3/1/3/131380345/gujat_kifusuligol.pdf
    • https://cdn.shopify.com/s/files/1/0436/4196/2646/files/kirinugezixunowum.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/46683299972.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/kokoduzirixisufuvupot.pdf
    • https://cdn.shopify.com/s/files/1/0432/1820/6888/files/xavuparumezeganifanavova.pdf
    • https://cdn.shopify.com/s/files/1/0434/7753/2822/files/accomplishment_report_intramurals.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/33520336659.pdf
    • https://cdn.shopify.com/s/files/1/0428/4062/1222/files/becky_g_can_t_stop_dancing_song.pdf
    • https://cdn.shopify.com/s/files/1/0434/9542/4165/files/vorexatarovupatadewisi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1673/9222/files/50521253474.pdf
    • https://cdn.shopify.com/s/files/1/0439/0499/1400/files/72404767016.pdf
    • https://cdn.shopify.com/s/files/1/0429/5835/6639/files/89753456894.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/xefuta.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/tixuzewi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cda.bin
ac146096d84bcdec2f7ca935238b448b20c509dd21553603faf0cba41bf4fca4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CDA 5264 bytes
font_01_sfnt_off00005eac.bin
38fe30a7ecb497afb46871fde5bfba5f90a86434a0a377943e5db3ce76529646		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAC 9800 bytes
font_02_sfnt_off00008091.bin
dabf0ccc451caf4864c9b22ca91318a92e8f625b469dd0561edf59b451c7a792		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8091 18776 bytes
font_03_sfnt_off00009df8.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF8 4324 bytes

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