Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfdeff4e4064982f…

MALICIOUS

PDF

44.2 KB Created: 2020-08-22 14:39:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94388cd7f2750f5e6a8f020f5b73d159 SHA-1: 955f0e031cfaf9ac2786276a1babe0ccd8f1efac SHA-256: bfdeff4e4064982f3810466ec106e447c797095ce5c2a7b29209ccf30cfcabce
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a title related to calculating reaction pathways, and also includes the malicious URL. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content broadly.

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=reaktionsweg+nach+der+faustformel+berechnen
    • http://files.ralfrosskamp.com/uploads/1/3/0/7/130738675/1858742.pdf
    • http://files.americasbestchildcare.com/uploads/1/3/1/8/131871692/1890124.pdf
    • http://files.bigoakstables.com/uploads/1/3/0/7/130739059/zemolumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7495/3120/files/the_carter_4.pdf
    • https://cdn.shopify.com/s/files/1/0434/1989/3927/files/nexepiven.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/keten.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/35322490343.pdf
    • https://cdn.shopify.com/s/files/1/0433/6068/2139/files/distribuio_binomial.pdf
    • https://cdn.shopify.com/s/files/1/0437/8293/0593/files/adjective_adverb_clause_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/69387462506.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7811/files/bestiario_juan_jose_arreola.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/16369152286.pdf
    • https://cdn.shopify.com/s/files/1/0431/6413/9674/files/87008323219.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4986/files/roxugula.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_off000062f9.bin
7b27b3705ffb91434bc8e8715619724805b07e39b948c9ec0668ccc60188c4e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F9 5736 bytes
font_01_sfnt_off0000766e.bin
06d6f1aae1852907c5252ad2a60c7094874e09f8edebce59a7dd7ef8078bba08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766E 14380 bytes

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