Malicious PDF — malware analysis report

Static analysis result for SHA-256 786616362fc07e14…

MALICIOUS

PDF

45.0 KB Created: 2020-08-08 20:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 072b4a82434f2adec011bc2708c58a9f SHA-1: 603533be2fe8ae14c539bc88cce0570dcaca6805 SHA-256: 786616362fc07e141de7ccda4afc49e1dbe660fbffedf0dbe4449c1744cf102d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and keywords related to a 'Riello 30kva ups manual', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, many hosted on Shopify. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload.

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.com/wb?keyword=riello%2030kva%20ups%20manual
    • http://salopomi.karinepigeon.ca/uploads/1/3/1/6/131636612/1ef5b4420f75fb.pdf
    • http://files.thethembaproject.org/uploads/1/3/2/7/132740541/692938.pdf
    • http://files.valentineorthotics.com/uploads/1/3/0/8/130814017/kakotipaxadovufas.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/92814695167.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7917/files/zezukoremil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38692385895.pdf
    • https://cdn.shopify.com/s/files/1/0433/7840/9622/files/ruberu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1415/files/ginegivotejujabete.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/71313340434.pdf
    • https://cdn.shopify.com/s/files/1/0433/8086/7235/files/91131218407.pdf
    • https://cdn.shopify.com/s/files/1/0431/6577/8080/files/52041204865.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/jewapusexowodo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3714/5753/files/48656086314.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/kannada_bible_old_testament_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/7618/8315/files/30020194293.pdf
    • https://cdn.shopify.com/s/files/1/0440/4540/2277/files/treble_clef_staff_paper.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_off00007199.bin
e8d0fee269299bd9382eb9717d1423513e237cac360fcd45ca6f7103911d275c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7199 5304 bytes
font_01_sfnt_off000083a3.bin
c49e6f4aaf7192691b52590f90f81e82e7d36afb29edfe720db4939acace2ed7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A3 10488 bytes

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