Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6a06094db451a9…

MALICIOUS

PDF

39.0 KB Created: 2020-08-19 09:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4df96c85905e06f8f885ee75a17e5f52 SHA-1: 25024287caa90ab5fae6d83aaa6a441a3647bcf2 SHA-256: bc6a06094db451a97e1403aeab75b3b4b01b809cc35fd3f6d323d171364a0f03
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify, but one critical link redirects to `ttraff.ru`. This domain is flagged as a malicious redirector, likely used to obscure the final malicious destination. The document body text, though garbled, contains keywords like 'Mac os iso for macbook air' suggesting a lure for software downloads. The presence of numerous PDF links, including the malicious redirector, indicates a link farm or SEO poisoning attack designed to attract users searching for specific software.

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=mac+os+iso+for+macbook+air
    • http://files.mezzomargaret.com/uploads/1/3/1/3/131398184/2855e23905.pdf
    • https://cdn.shopify.com/s/files/1/0428/5700/5215/files/39379568259.pdf
    • https://cdn.shopify.com/s/files/1/0435/6718/6079/files/bhagavad_gita_in_english_with_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0439/1269/1867/files/rufagubawusosobim.pdf
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/driver_manual_nj.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2637/files/barurivikoboroditofofixip.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3510/files/showbox_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/1491/3191/files/68656564923.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2687/files/16849060562.pdf
    • https://cdn.shopify.com/s/files/1/0434/8225/1421/files/rivexivofitotetobowumi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6186/9733/files/bionic_turtle_question_sets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/25545774976.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_off00005b70.bin
ad2c7ab0f50c2ddcc5bad9815733d7491cad445d4e627afbc76d2dc4b91b3cb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B70 5204 bytes
font_01_sfnt_off00006d0c.bin
8977b80097a125d2eb7f232362f4ad513d3b5831247c7897907149d8dec912bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0C 10136 bytes

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