Malicious PDF — malware analysis report

Static analysis result for SHA-256 518e4f5ac19e3cf3…

MALICIOUS

PDF

41.4 KB Created: 2020-08-07 07:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8848ce225bde5c07695a53b1c89183a4 SHA-1: 4dd443700e3b800481fbf9cfc2d181b81fb6931e SHA-256: 518e4f5ac19e3cf3c89ff97a0090d9ceb4dfcf58d5757ea1cc05b1d5579a139d
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 PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the same URL, reinforcing its role as a lure. No scripts were extracted from this sample.

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.cc/pify?keyword=agile+methodology+tutorial+for+beginners+pdf
    • http://fubep.relaxedmindtaichi.com/uploads/1/3/1/1/131164243/bokuxosigit_dabelodasemew.pdf
    • http://files.willparkermusic.com/uploads/1/3/1/3/131398533/kuxonozezezowijegod.pdf
    • http://files.singaporenv.com/uploads/1/3/2/6/132681767/0cd51dd.pdf
    • http://bewaguwu.artfulscents.com/uploads/1/3/2/7/132740214/jipoponaz.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/tusedajasumananalevodev.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/senasidezididedo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3854/files/fuxavopusoguxik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0579/5752/files/atama_no_taisou.pdf
    • https://cdn.shopify.com/s/files/1/0429/2670/2758/files/50331608213.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/relejeneres.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1074/files/28788728346.pdf
    • https://cdn.shopify.com/s/files/1/0431/0011/1009/files/61860181707.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/luleteremise.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0440/6283/4853/files/lumujavujugumutowakekami.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/dadotunekasifux.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_off000061b5.bin
ac328e55d265881bcdeacd017f5c59eca68a8f64a42abfa34f3de6db68cc3818		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 5688 bytes
font_01_sfnt_off000074e9.bin
bc5b17d99ebbcbf325a3386e6f66b4328f52cb1cd6af140b63c60f26436fa17f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E9 10456 bytes

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