Malicious PDF — malware analysis report

Static analysis result for SHA-256 920c84b5d1cf9c2f…

MALICIOUS

PDF

40.7 KB Created: 2020-08-15 16:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 911c34a597b1ecbc40d713e6dc85069c SHA-1: b4d7272d26e1ac015d207da33f29d8d492687126 SHA-256: 920c84b5d1cf9c2f7ef67bb2f233fd12011de766b70206fca26be3cc0c4ba052
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links, 'https://ttraff.ru/wb?keyword=solve%20for%20happy%20pdf%20files', is identified as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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/wb?keyword=solve%20for%20happy%20pdf%20files
    • http://files.webberweather.com/uploads/1/3/1/3/131379820/4842439.pdf
    • http://pipofiba.toharlev.com/uploads/1/3/0/7/130740178/refol-muxum-kokoxariridad.pdf
    • http://files.capitolsteamandclean.com/uploads/1/3/0/7/130776791/jebepomasugapab.pdf
    • http://files.totteytreats.com/uploads/1/3/0/9/130969494/muxikup-sopugelizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6090/files/87000071027.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/7510400276.pdf
    • https://cdn.shopify.com/s/files/1/0439/0171/4587/files/85109289784.pdf
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/98852342842.pdf
    • https://cdn.shopify.com/s/files/1/0430/4424/1562/files/synonyme_deutsch_bungen.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/friendship_story.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1543/files/aptenodytes_forsteri.pdf
    • https://cdn.shopify.com/s/files/1/0431/8635/6375/files/45290104616.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_off00005f77.bin
3bcb00e3ca960efc6b2be286c95b71bd5195960ba9e2a0f40d2e0a325e946110		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F77 5396 bytes
font_01_sfnt_off000071d0.bin
d9b0c57a9fca45acbaafe839f549a119041200909b9d1837ed34de68eabb805a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D0 10768 bytes

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