Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b65767351bc9cfd…

MALICIOUS

PDF

48.4 KB Created: 2020-08-12 09:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 459d26e35ab9fa09b9695d28d302b2d8 SHA-1: 085944c0060da22e5fdff6b87a0bb5c775b81797 SHA-256: 3b65767351bc9cfd96f690de1580bff4bd08204bd8a50340808f30a6441db76f
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious redirector URL. This suggests the primary goal is to redirect the user to a potentially malicious site, likely for phishing or malware distribution.

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/pify?keyword=bestiariusz+starego+%25C5%259Bwiata+pdf+chomikuj
    • http://files.kbesq.com/uploads/1/3/1/4/131438891/1323835.pdf
    • http://files.kahproductions.com/uploads/1/3/0/8/130874067/rizokosapimuka-farevig.pdf
    • http://files.lavenderhatbox.com/uploads/1/3/1/3/131384638/dapowekovufo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3535/files/71927418160.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3763/files/national_payment_system.pdf
    • https://cdn.shopify.com/s/files/1/0447/6777/2821/files/bcs_result_40.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/wamekaferebadorobiwuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8211/1381/files/46754981003.pdf
    • https://cdn.shopify.com/s/files/1/0433/6399/1717/files/potus.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2695/files/types_of_public_relations_research.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/73314007811.pdf
    • https://cdn.shopify.com/s/files/1/0437/8463/4530/files/catalogo_hinode_dezembro_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdf
    • https://cdn.shopify.com/s/files/1/0435/1403/6383/files/55653311727.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/majabosi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9746/4731/files/xosatuwokuporivi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/types_of_casting_defects.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_off000078b4.bin
59ee09feb56fb8730e96d58a7e45c3ec30977fbf5fc62d15d7bbadfbaf09529d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B4 6068 bytes
font_01_sfnt_off00008ce1.bin
e7408af96bbf78083408e4ef26bce070e0f096c162cee290f110beb52e27de55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE1 11888 bytes

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