Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a09d8bceb3c9bc2…

MALICIOUS

PDF

47.7 KB Created: 2020-08-17 07:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b1054590d2e730ac1f3c4d397b22ef6 SHA-1: b5ece18c24cefce5ca2e7e81593b12b083be8390 SHA-256: 2a09d8bceb3c9bc24db6d6c2fab9fe2fc66c9f0f07505d7c74f8a0d586272a3d
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'https://ttraff.cc/pify?keyword=beer+lambert+law+equation+pdf', indicating a lure to a malicious site. This suggests the document is designed to trick users into clicking the malicious link, likely leading to further malware download or phishing.

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=beer+lambert+law+equation+pdf
    • http://files.dessante.com/uploads/1/3/1/3/131384602/pevovede.pdf
    • https://cdn.shopify.com/s/files/1/0434/2041/8198/files/jetezo.pdf
    • https://cdn.shopify.com/s/files/1/0447/4968/4885/files/eric_tupper_introduction_to_naval_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/barron_s_gre_latest_edition_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/6068/2139/files/distribuio_binomial.pdf
    • https://cdn.shopify.com/s/files/1/0432/4006/3143/files/autosar___layered_software_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0440/8583/7989/files/physical_therapy_aide_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0439/8333/9678/files/mutoget.pdf
    • https://cdn.shopify.com/s/files/1/0435/8704/3496/files/vubilezuxejid.pdf
    • https://cdn.shopify.com/s/files/1/0439/5565/0718/files/zawubavi.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_off00007298.bin
8be198c38361801041f6371d2917875a1fd3fe9991cdfcba5ed66f0618878e04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7298 5416 bytes
font_01_sfnt_off000084fb.bin
6bf27b3cd4830ee319ec5151bbf9f94ffa7412827eb98b70f0cda79703ebeb25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84FB 14320 bytes

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