Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f458b6e9ec3e5e6…

MALICIOUS

PDF

45.5 KB Created: 2020-08-03 20:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe5acb4085ddc2d88e527fe5a2145b36 SHA-1: ebc7f5df7f1303931ba01d5204082893d09e0700 SHA-256: 3f458b6e9ec3e5e6cc21febd700a5e9320e599904029a0bf87ced9f0e3226b2b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is further disguised with a keyword related to website development proposals. This suggests a social engineering tactic to trick users into clicking malicious links. The document body, though heavily obfuscated, also contains the redirector URL and several other Shopify-hosted PDF links, reinforcing the link farm and redirection attack pattern.

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.cc/pify?keyword=website+development+proposal+template+pdf
    • http://files.devinedoggies.com/uploads/1/3/1/4/131437453/tegub.pdf
    • http://files.rsvpvolunteercaregivers.org/uploads/1/3/2/6/132681824/navate.pdf
    • http://files.resourceology360.com/uploads/1/3/0/7/130775304/pazebe.pdf
    • http://files.gvstclub.com/uploads/1/3/1/8/131871864/mazisesat-koturekasas-kuvalusexitoro-tesutewage.pdf
    • http://files.zootasticpark.com/uploads/1/3/2/6/132695329/c916c1d344388.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/lawewofizupogipojux.pdf
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/24665338265.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/61005075964.pdf
    • https://cdn.shopify.com/s/files/1/0440/7135/4533/files/21292500674.pdf
    • https://cdn.shopify.com/s/files/1/0436/5336/5910/files/bidowavapokabugexesuze.pdf
    • https://cdn.shopify.com/s/files/1/0436/3599/8880/files/93741006054.pdf
    • https://cdn.shopify.com/s/files/1/0437/7319/8497/files/82728129995.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7576/files/sofipabimaxogeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/wavevas.pdf
    • https://cdn.shopify.com/s/files/1/0436/8960/7321/files/30156674316.pdf
    • https://cdn.shopify.com/s/files/1/0435/8170/2303/files/switch_case_in_c_programming_examples.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/vasesazow.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/46070981934.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/wozuxusedenarimubas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/pijavute.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_off000072b7.bin
e0ff9e021bab93f546bdc97a4583ea9ca91c02131502daa07e1fa92af3d6ad40
pdf-font-stream PDF embedded font (sfnt) at offset 0x72B7 5400 bytes
font_01_sfnt_off00008500.bin
00dd9899d16be890f36e810433da2290115fb7248fc6370ae1d822164a223b03
pdf-font-stream PDF embedded font (sfnt) at offset 0x8500 10232 bytes