Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51234a8291aeca8…

MALICIOUS

PDF

36.1 KB Created: 2020-09-05 15:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0f2691dd48d33c7ee635cc1be87a941 SHA-1: 507f731eb6d22f52da515adc4a268b5e2f49832a SHA-256: b51234a8291aeca8f86bb07110e5f26ccb60bc528156d3b9e94cfc1238de98a2
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an 'application form for australian visa 600'. This link points to 'ttraff.me', which is flagged as malicious. The document also contains a large number of embedded links, many pointing to Shopify, likely as part of an SEO spam campaign to improve search engine ranking for malicious content. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=application+form+for+australian+visa+600
    • https://cdn.shopify.com/s/files/1/0428/7568/2972/files/sebokikeresepomu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/100_books_bucket_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/arrive_guidelines_for_reporting_animal_research.pdf
    • https://cdn.shopify.com/s/files/1/0460/0650/1543/files/12710986684.pdf
    • https://cdn.shopify.com/s/files/1/0439/3995/4856/files/rawagimifamimizokujame.pdf
    • https://cdn.shopify.com/s/files/1/0461/5933/1491/files/fogiwewubovurilewu.pdf
    • https://static.usrfiles.com/ugd/c63bf9_a1ae8e76fbbd46b983c8ea93cf12a7d9.pdf
    • https://static.usrfiles.com/ugd/02631b_c24425cddae54d9eacbe436f01800a10.pdf
    • https://static.usrfiles.com/ugd/05900a_3948ed7e1d6642a592f3713a03581c0d.pdf
    • https://static.usrfiles.com/ugd/c7a620_0ae2fd9491f44f97b30d9f124298125c.pdf
    • https://static.usrfiles.com/ugd/6c8f37_7643eb7a1ebf47a4a6f63ae4450ff399.pdf
    • https://static.usrfiles.com/ugd/d01287_dc5718e361704147a4aa18b2b34bc631.pdf
    • https://static.usrfiles.com/ugd/fd4c29_2e6e17e4f6f34c75bbe3d352dcce4d15.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_off00004f79.bin
31d0dab80e26f76be9299cf1189290e97b917fec7f8faf22c95148d1e834f727		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F79 5504 bytes
font_01_sfnt_off00006226.bin
0942f2eb33f4614db631d695047ec4d70a8ef03f66fdaef573a023556659f429		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6226 9836 bytes

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