Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd9ebb06c7b3b262…

MALICIOUS

PDF

43.3 KB Created: 2020-09-18 07:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c34895edefddd48312014829395f862 SHA-1: 692ff17223dd7a009769e3530927599df64c4504 SHA-256: bd9ebb06c7b3b262041de0bca69fefca420908c86ec5ed935ed247092fac286b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to known malicious redirectors or suspicious domains. The document body, though heavily obfuscated, contains text fragments and URLs that align with the heuristic findings of a malicious redirector and a link farm. The primary attack pattern involves luring users to external malicious sites through these embedded links.

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.me/wix?keyword=section+1+enrichment+calculating+work+worksheet+answers
    • http://files.firstclassambulance.com/uploads/1/3/1/4/131438316/7425848.pdf
    • http://telusiw.qksnd.com/uploads/1/3/1/4/131454012/kiniviza-meziburixenil.pdf
    • http://sabibatif.windshieldrepaircorpuschristitx.com/uploads/1/3/1/3/131398140/6998537.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4568/files/ammonium_ferric_sulphate_msds.pdf
    • https://cdn.shopify.com/s/files/1/0430/0318/3258/files/62256723470.pdf
    • https://cdn.shopify.com/s/files/1/0467/9955/2663/files/free_maria_montessori_books.pdf
    • https://cdn.shopify.com/s/files/1/0439/4732/7646/files/chemistry_of_life_chapter_2_study_guide.pdf
    • https://a69c960a-ead5-467a-b5cb-7273e6dd946b.filesusr.com/ugd/2ca09c_49d9a7024d5f4c91b288ef569dfb4f7b.pdf?index=true
    • https://d08166c3-0439-4e0e-932d-5798eae8f301.filesusr.com/ugd/7d21c0_5f9e11bab8164b0989876bd207e82d7f.pdf?index=true
    • https://a94fc899-fb73-43be-aa1b-657558710512.filesusr.com/ugd/3b6424_8f6fc9a294b0439797db22deb127bbef.pdf?index=true
    • https://3036d537-5f14-4d52-8e24-e6e0a6ee3a4f.filesusr.com/ugd/e32576_9af5002b374540cdaf3a266db577cacc.pdf?index=true
    • 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_off00006283.bin
7f1ed0ddd3eb69efd26012115d59131e01db81736b6dac970bbaaedc3b20bfa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6283 5524 bytes
font_01_sfnt_off00007534.bin
ad5ff2ccc6667b46e36d7eb73a8aee773f59a9b86a7279cd125465e0785e5c47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7534 13820 bytes

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