Malicious PDF — malware analysis report

Static analysis result for SHA-256 91763f2852d5d1c5…

MALICIOUS

PDF

37.5 KB Created: 2020-08-29 23:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc2a7c647a87ebd5de6398a258ecf2fc SHA-1: 14d61de7436e8422e4260c86fa5a9fd689868e82 SHA-256: 91763f2852d5d1c569fe590580699971cceed22764f9281f465335f9a4d94d8c
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious infrastructure, disguised as a plumber's catalogue. The primary malicious URL is ttraff.ru, which is part of a redirector chain. The document also contains a large number of links to Shopify-hosted PDFs, likely part of a link farm to improve SEO for the malicious redirector. No scripts were extracted from this sample.

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.ru/wix?keyword=plumber+bathroom+fittings+catalogue
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/xagarapilolovipiresa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/defagiwizi.pdf
    • https://cdn.shopify.com/s/files/1/0438/9273/6155/files/lorule_map_guide_hyrule_warriors.pdf
    • https://static.usrfiles.com/ugd/7e6083_bb8d0acd0f5b4b918b447579909ff167.pdf
    • https://static.usrfiles.com/ugd/822ecd_1e250fe08ee84b89a52806a65a8cfc6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_09037ec7e8bd496e9e45fd49e8486b61.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/ricketts_cephalometric_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0437/8443/7922/files/ojdbc14_jar_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4334/8892/files/proper_address_envelope_format.pdf
    • https://cdn.shopify.com/s/files/1/0441/0625/2440/files/tukis.pdf
    • https://cdn.shopify.com/s/files/1/0443/5014/4668/files/wizogu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004784.bin
1745fd504e6b04b3ca5eec4bf8ec0a70bb96dd52eb61e2d782d9571aec232403		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4784 5316 bytes
font_01_sfnt_off00005969.bin
fc23bd55d4ad897a38c755c72c6798e0da04140440524669203540f5fc921273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5969 9888 bytes
font_02_sfnt_off00007b37.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B37 4324 bytes

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