Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9322fef8909670a…

MALICIOUS

PDF

50.3 KB Created: 2020-08-23 22:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 273f5c36b5e17746cd8c527e30cf7e55 SHA-1: ed14358db12f05f4d338dad7e578aeb6ad643aac SHA-256: c9322fef8909670a7048d9d88bb26dd2adfc68cac93622bc8be71e560d8e40a8
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a job advertisement template. The ML classifier strongly indicates maliciousness, and the PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, many of which point to potentially malicious or unknown domains. The primary malicious URL identified is ttraff.com, which is used to redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/pify?keyword=job+advertisement+template+microsoft+word
    • http://vowapogal.aroncolemusic.com/uploads/1/3/1/3/131384169/26b6838dba5789.pdf
    • http://files.21group-of-artists.com/uploads/1/3/1/3/131380480/8a570c6bfea.pdf
    • http://vodev.addingtonforge.com/uploads/1/3/2/7/132710624/lexeni_fegetetagupiz.pdf
    • http://files.otto-and-olive.com/uploads/1/3/1/4/131453332/kovopix-pafesovidipegin.pdf
    • http://mejevo.canoetorontoisland.com/uploads/1/3/1/3/131380042/4245953.pdf
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/podazosokosotojoru.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/57976386571.pdf
    • https://cdn.shopify.com/s/files/1/0464/9261/4824/files/shyam_baba_ki_aarti_audio.pdf
    • https://cdn.shopify.com/s/files/1/0440/3301/5958/files/68744546910.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/84732733270.pdf
    • https://cdn.shopify.com/s/files/1/0456/4369/4247/files/lowabugakagafumanizezudo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/danuxoraluzemadisasesul.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/birthday_cake_design_photos.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/10953498244.pdf
    • https://cdn.shopify.com/s/files/1/0434/4460/0999/files/surah_yasin_file_type.pdf
    • https://cdn.shopify.com/s/files/1/0438/0409/8722/files/sh_blends_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/4184/0535/files/weather_report_for_melbourne_fl.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000782a.bin
2cb206a8f20a8c6be5a8c4a6f6d43d182fc1425c8280eff2f47bf69efe1ee5fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782A 5372 bytes
font_01_sfnt_off00008a60.bin
402ae007e07b1919185d63b2a65f3b5ebc19e0b0c96160428203f53ca4a4e98e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A60 10316 bytes
font_02_sfnt_off0000ada5.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADA5 4324 bytes

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