Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57dfd40be02a85c…

MALICIOUS

PDF

42.0 KB Created: 2020-08-18 23:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf5943f8bf837dd521a6243e1c3d724d SHA-1: 531b4f17d86add71ae50b153f0ebde6518560dbf SHA-256: d57dfd40be02a85c92e46d66c2fc07e15d9651630312c8b2c9f0530cedefc2a7
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary redirector URL being https://ttraff.ru/pify?keyword=new+blob+javascript+pdf. This suggests a link farm or redirection tactic, likely to distribute further malicious content or engage in SEO manipulation. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector and link farm.

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.ru/pify?keyword=new+blob+javascript+pdf
    • http://files.socialsciencesblue.com/uploads/1/3/0/7/130739264/babekunoxajefi.pdf
    • http://files.cedgephotography.com/uploads/1/3/0/7/130775506/sejurate.pdf
    • http://nibogaker.blaisebaptist.org/uploads/1/3/0/7/130775734/5486309.pdf
    • http://vemapux.rakshitbuildtech.com/uploads/1/3/0/8/130814161/rarozodos_pikexotifiga_zetonaxukowaxe.pdf
    • http://kawudaxi.wintechfrance.com/uploads/1/3/1/4/131438464/dijigagero_kenezazebisit_jefezuwujoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/96269560560.pdf
    • https://cdn.shopify.com/s/files/1/0434/6403/2422/files/liruxuviwanepoxiliz.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/suzanne_powell_alimentacin_consciente_libro.pdf
    • https://cdn.shopify.com/s/files/1/0428/5811/9334/files/60407484177.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2866/files/causes_of_teacher_absenteeism.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/zadorotelitosufufa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7811/files/lagu_dj_aserehe_aha_ehe.pdf
    • https://cdn.shopify.com/s/files/1/0439/0594/1672/files/rexanegeto.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/jukiber.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/56738648116.pdf
    • https://cdn.shopify.com/s/files/1/0439/9398/9278/files/72784873795.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_off000065f6.bin
6fdf7d90dfd842e830868103874d34d7573ec34ba6edaf006b214d15624e3d03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F6 5488 bytes
font_01_sfnt_off000078c1.bin
01d8deccc4d640f3b88a51f84d362daf63595148579c6f3ce42219ae466775d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C1 10128 bytes

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