Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4fdf409db4f25f4…

MALICIOUS

PDF

44.5 KB Created: 2020-09-02 09:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f31a2e898916f67cf4a407de9b26a47 SHA-1: ecccd8644553a1f056a4217176bfb26926839be9 SHA-256: f4fdf409db4f25f4745563bc48d2fd81e5ed80edbf4f7ef015dce3c79be5c9c0
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is disguised as an academic template ('Elsevier template overleaf'). This, combined with the numerous embedded URLs, points to a phishing or malware distribution attempt. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a malicious site.

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/wix?keyword=elsevier+template+overleaf
    • https://cdn.shopify.com/s/files/1/0437/9977/3341/files/37097103200.pdf
    • https://cdn.shopify.com/s/files/1/0447/3192/4629/files/bengal_tiger_2015.pdf
    • https://cdn.shopify.com/s/files/1/0465/1109/5958/files/after_effects_animated_logo_template.pdf
    • https://static.usrfiles.com/ugd/7198c1_3d456f60254b475b8b1ccacf1ed5f068.pdf
    • https://static.usrfiles.com/ugd/682d1c_9b419f180024413cb6952db61673228c.pdf
    • https://static.usrfiles.com/ugd/b8c837_778fabad083c45bcac7329df819bf7d4.pdf
    • https://static.usrfiles.com/ugd/8b49c6_be098daf52ca4a56840331b7239ef0a5.pdf
    • https://cdn.shopify.com/s/files/1/0433/3935/0181/files/25948509655.pdf
    • https://cdn.shopify.com/s/files/1/0434/2035/2677/files/tesla_effingham_performance_center_august_3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sopituwoxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0938/4343/files/25242763506.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3695/files/arracacha_beneficios.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/pekoboriliz.pdf
    • https://cdn.shopify.com/s/files/1/0452/1210/6912/files/mvs_assembler_language.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_off00006e19.bin
375568fef5c7f93305ad5164364960486a9ef4e1276f9ac0dc830f065bf48e1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E19 5064 bytes
font_01_sfnt_off00007f44.bin
a9319ef4503055a25ffb2ad8e66b94f91a9e2b703c7523392ea895085bd4804d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F44 11124 bytes

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