Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2a76aab785c1a8…

MALICIOUS

PDF

49.6 KB Created: 2020-08-14 02:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 603efb9c36b067798b250a6779e2320d SHA-1: 707211652a7e7a0da8d377fb657f9c862782e754 SHA-256: 3a2a76aab785c1a885276fa497da3584dcedbfa0e2498fbd5e8436a9366c632c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains embedded links that redirect to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting it is a 'Year 10 work experience cover letter template', which is likely a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to benign Shopify domains, but the primary malicious link is to ttraff.com.

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/pify?keyword=year+10+work+experience+cover+letter+template
    • http://files.canningandcookingathome.com/uploads/1/3/1/3/131384383/dekujoko-benizedopugaki-rasaf-puzuler.pdf
    • http://files.nadersayadi.com/uploads/1/3/1/6/131636748/jiruzasasukilixoduz.pdf
    • http://files.blairtherapies.com/uploads/1/3/1/4/131483069/fitakuninuvemote.pdf
    • https://cdn.shopify.com/s/files/1/0436/1751/7731/files/accursed_share_bataille.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/83050825886.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/xojera.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/cambridge_dictionary_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/1910/6466/files/67205788333.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4981/files/81652118928.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1770/files/28457373303.pdf
    • https://cdn.shopify.com/s/files/1/0438/4115/9333/files/zozovosigid.pdf
    • https://cdn.shopify.com/s/files/1/0440/6129/4757/files/figawerenerelaza.pdf
    • https://cdn.shopify.com/s/files/1/0435/2707/8052/files/13659271847.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2761/files/recipe_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075d5.bin
dc9486a0c5d05428acb2f7c550f57323dac3e8fe805d8299c939724222df3ffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D5 5128 bytes
font_01_sfnt_off00008746.bin
c1d7c24c41017f81570d386f1015f5d0edd894cd49be58980d66b086153e0608		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8746 10352 bytes
font_02_sfnt_off0000aaa6.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAA6 4324 bytes

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