Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34e4dd6d9f97b75…

MALICIOUS

PDF

45.5 KB Created: 2020-10-02 08:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: efd763928dfa2bf73b205e3938fc7d4a SHA-1: 01305ff4c7a9888d970dc2a498b54229ccc291d6 SHA-256: e34e4dd6d9f97b75d1c7ddef85f7e5031e31a110de7516b348c7f5712f553c18
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to Shopify domains hosting other PDFs, likely as part of a link farm or SEO manipulation. One critical heuristic identified a direct link to a known malicious redirector, 'gettraff.ru', which is also present in the document body. This suggests an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing. The ML classifier also strongly indicated maliciousness.

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://gettraff.ru/strik?keyword=topside+squonk+manual In PDF document text
    • https://site-1037152.mozfiles.com/files/1037152/92096533123.pdfIn PDF document text
    • https://site-1036902.mozfiles.com/files/1036902/nosikidogogap.pdfIn PDF document text
    • https://site-1038905.mozfiles.com/files/1038905/11148912269.pdfIn PDF document text
    • http://sevopexum.visuallyaccessiblecities.ca/uploads/1/3/1/3/131383332/2290910.pdfIn PDF document text
    • http://dixiz.duniaamir.com/uploads/1/3/1/4/131438019/kavibilazefi.pdfIn PDF document text
    • http://purolel.nlacademy.net/uploads/1/3/1/4/131438729/1815448.pdfIn PDF document text
    • http://files.learningpgh.org/uploads/1/3/1/6/131636697/fd91b931b8d4.pdfIn PDF document text
    • http://files.umdfauxpaz.com/uploads/1/3/2/3/132303229/13ce0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1044/8795/files/buchanan_county_assessor_st_joseph_mo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1979/9192/files/input_output_machines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2913/1175/files/car_owners_manual_nyt_crossword_clue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9375/7603/files/vanunafezusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0475/1654/9286/files/i_saw_red_lyrics_sublime.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A8 5148 bytes
SHA-256: 2a38414f06a503a1f5e57524caf4aa5022f4ff04e331b802d9015a052f9c484f
font_01_sfnt_off00007b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B16 15140 bytes
SHA-256: c561e88f8f3b300fec7e579325beef0753195ce76bf97c2cdd052b1d281b4114

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