Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4db0387e3943c2…

MALICIOUS

PDF

42.7 KB Created: 2020-08-31 04:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63989bc32d23e0c36eea2ba23fd9768e SHA-1: 04a11af059e9864eac00fd31846c13230e9d8c45 SHA-256: fb4db0387e3943c24a8e21e804c06a39f5de208126598ccc20321ae8983b1644
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector (ttraff.com). The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting an attempt to manipulate search engine results or distribute malicious content through numerous links. The presence of these links and the redirector strongly suggests a phishing or malware distribution attempt.

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/wix?keyword=asepsia+medica+y+quirurgica
    • https://cdn.shopify.com/s/files/1/0428/8937/9996/files/ramawexeserodeminem.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/geragefewatererir.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/64298867661.pdf
    • https://cdn.shopify.com/s/files/1/0433/6723/5742/files/believer_partitura_para_piano.pdf
    • https://cdn.shopify.com/s/files/1/0465/7935/1719/files/gold_gradient_photoshop_free_download.pdf
    • https://static.usrfiles.com/ugd/e3325f_ca69044963e941c4ab297e9f2d2026fd.pdf
    • https://static.usrfiles.com/ugd/38bf1f_0926712b103140758a88a4d67bb28f9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_24929345fbb940dbb2dee78f07c4ccf0.pdf
    • https://static.usrfiles.com/ugd/a2d007_b73b2cffeeb74230861a1b8717d5d723.pdf
    • https://static.usrfiles.com/ugd/97aff7_320928fd42ab4504a73842b72a34487e.pdf
    • https://static.usrfiles.com/ugd/d54300_19660e8cbfac4ce7a7e920b12685c5c3.pdf
    • https://static.usrfiles.com/ugd/ee6770_8b0a69e21fc94687ace2f829461ef213.pdf
    • https://static.usrfiles.com/ugd/c6ac46_f552f9d9cb9a4dcfa6ce522f094f349a.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_off0000688a.bin
d1263fe15d58a7b59c3872d369e1f50fff9fe6d644167a42738e8b008da6b624		 pdf-font-stream PDF embedded font (sfnt) at offset 0x688A 5580 bytes
font_01_sfnt_off00007b60.bin
ae8f460f26cf1fe6ba71afdc32502f27fd1169ba2e1f93761aac73fb96a88beb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B60 10312 bytes

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