Malicious PDF — malware analysis report

Static analysis result for SHA-256 2264956d79ef6bb6…

MALICIOUS

PDF

39.3 KB Created: 2020-08-22 03:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9604ad08b3a39a294c4bbccd17fc17b4 SHA-1: 0c8d6e25af315542f24fee1527deda3dc7251a62 SHA-256: 2264956d79ef6bb6f5499c1f9de89a7253a754137bf6698cb10be275d945b88c
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=ph%25E1%25BA%25A7n+m%25E1%25BB%2581m+rufus+2.+9'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on cdn.shopify.com. The document body contains garbled text but also includes the malicious redirector URL and several other PDF URLs, reinforcing the redirection attempt. No scripts were extracted, but the primary attack vector appears to be luring the user to a malicious site via embedded links.

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=ph%25E1%25BA%25A7n+m%25E1%25BB%2581m+rufus+2.+9
    • http://sakom.rabbitholerealestate.com/uploads/1/3/0/7/130775677/tebitufopaz-semapubazup-gomonigagotasen.pdf
    • http://files.thatpenbloke.com/uploads/1/3/0/9/130969656/pipogilivikaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6757/files/keroxosadurem.pdf
    • https://cdn.shopify.com/s/files/1/0437/6877/4814/files/39890108846.pdf
    • https://cdn.shopify.com/s/files/1/0434/8585/5897/files/28569929585.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/77913564296.pdf
    • https://cdn.shopify.com/s/files/1/0432/6811/2550/files/feliwexelove.pdf
    • https://cdn.shopify.com/s/files/1/0428/9147/7159/files/lexus_sc400_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/zunagofi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7138/files/bapitajide.pdf
    • https://cdn.shopify.com/s/files/1/0434/0308/3928/files/voodoo_child_slight_return_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5861/files/defuji.pdf
    • https://cdn.shopify.com/s/files/1/0428/8721/7311/files/maxazukim.pdf
    • https://cdn.shopify.com/s/files/1/0435/4870/4920/files/speaking_activities_in_classroom.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/zubirupab.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_off0000594f.bin
47958ee123e03d7d1307a7a0d64e7de81d1571519381c10d7dcdf6d79aff9834		 pdf-font-stream PDF embedded font (sfnt) at offset 0x594F 5516 bytes
font_01_sfnt_off00006b84.bin
51b5e0934877295ec8142e99dec3567d98eeebc9c1e2af1223ac1e2b0196af53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B84 10892 bytes

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