Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a710ded06902966…

MALICIOUS

PDF

40.5 KB Created: 2020-08-24 17:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50451cb4582dc8c28c6ad1314dbd1e77 SHA-1: 91f8c2e436d435e8653cce7b8f1a1db54096aeee SHA-256: 3a710ded06902966ca7564d4d8cd3d0a742257b25cfdbc7b714cdf352377d2b4
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL, https://ttraff.ru/pify?keyword=list+of+french+adjectives+pdf, is designed to lure users into clicking on it by appearing to offer a list of French adjectives. This technique is commonly used to distribute malware or lead users to phishing sites. No scripts were extracted, but the heuristic firings strongly indicate a malicious redirector and link farm strategy.

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=list+of+french+adjectives+pdf
    • http://files.stockbridgeseatco.co.uk/uploads/1/3/2/6/132696146/269a34f220b3.pdf
    • http://resixo.twinoaksbr.org/uploads/1/3/1/4/131437987/zosifivemajokonopo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7107/0617/files/wozej.pdf
    • https://cdn.shopify.com/s/files/1/0437/2480/0168/files/interior_design_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0464/6889/0782/files/39986346338.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/35031129159.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7616/files/54454885909.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/23845322364.pdf
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/92173801840.pdf
    • https://cdn.shopify.com/s/files/1/0431/4411/8423/files/95710926722.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_off00006214.bin
e1fc3eaae249e60ed47a7bd2f8558557538a00e718ff8316c9ec63d4747bd838		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6214 5288 bytes
font_01_sfnt_off00007412.bin
f48d1eef5b4ed060e538f613e083c90669fa87d7ef8ca7a1722f5347811d7b5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7412 9844 bytes

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