Malicious PDF — malware analysis report

Static analysis result for SHA-256 f558350433852029…

MALICIOUS

PDF

37.7 KB Created: 2020-08-31 19:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79f671a4922600574c9b94756e72a05f SHA-1: aa15146c6c2a6b07c25d084e96f4f67d5b01d90e SHA-256: f558350433852029983e2fb11541fcf35fb0603166eda018850f335fc0da8314
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=advanced+aircraft+analysis+free'. This indicates a phishing or social engineering attempt to redirect the user to malicious infrastructure. The document body, though heavily obfuscated, contains the same URL, reinforcing its role in the attack. The presence of a large number of external PDF links also suggests a link farm, a common tactic for SEO poisoning or distributing malicious content.

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.ru/pify?keyword=advanced+aircraft+analysis+free
    • https://cdn.shopify.com/s/files/1/0449/4888/1567/files/diagnostico_de_anemia_por_deficiencia_de_hierro.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/19578859392.pdf
    • https://cdn.shopify.com/s/files/1/0437/1723/0741/files/13663682465.pdf
    • https://static.usrfiles.com/ugd/c8a981_384e77ac4bcc4ac4a177fcd51e2dfeb5.pdf
    • https://static.usrfiles.com/ugd/105a8c_38d0a5e685774d1295fe0cd52f9cbdd5.pdf
    • https://static.usrfiles.com/ugd/3de8a6_792a836aff074392b5816be90ce020d3.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_7395bf49a7c3406d8f662a3485c9d571.pdf
    • https://static.usrfiles.com/ugd/b13fd1_44cfd2df89044ec292517b54af9a4549.pdf
    • https://static.usrfiles.com/ugd/b85eb0_8e3237aad0ba4c0e9d979b09263a9bf5.pdf
    • https://static.usrfiles.com/ugd/f0e51d_6daa245fa5bc48d2989868c0231d17d5.pdf
    • https://static.usrfiles.com/ugd/4b68be_4e02f7c6b29140b7a9395c31856aa6d2.pdf
    • https://static.usrfiles.com/ugd/824332_1008e82afe3340ff8043b4095acade0e.pdf
    • https://static.usrfiles.com/ugd/362633_6c597f4c09b3411db7ab257cda8f7370.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_off00005430.bin
7e14bd8c1728f6d7e8ed3332f859b7812e9f007248524c91b58d0462503e6f61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5430 5164 bytes
font_01_sfnt_off000065e3.bin
286f7a614487f59a81b27c3474b5b87c3252bf96733506d84a00030104aa1b5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E3 10476 bytes

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