Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0508c0bc1da03f3…

MALICIOUS

PDF

51.9 KB Created: 2020-08-04 21:39:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ab0cf16b824ee20098c212a7586153d SHA-1: ffa3f10b4fd9ed0229e3f4240b3b5e84569a5c3f SHA-256: a0508c0bc1da03f392896d996fa9c7c958374996ace65c54d712f1535020f9cc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

The PDF contains a lure to install a browser extension or update, which is a common social-engineering tactic. It also hosts a large number of external PDF links, many of which point to Shopify domains, suggesting a link farm for SEO poisoning or to obscure malicious redirects. The primary malicious URL, 'https://ttraff.cc/pify?keyword=counseling+skills+checklist+pdf', is identified as a malicious redirector, indicating the document's intent is to lead the user to harmful content or malware. No scripts were extracted, limiting the analysis of direct payload execution.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=counseling+skills+checklist+pdf
    • http://files.mikesequipment.com/uploads/1/3/1/3/131379706/8999476.pdf
    • http://files.okds-live.com/uploads/1/3/2/3/132302718/1110058.pdf
    • http://files.nicholasperryclark.com/uploads/1/3/1/6/131606486/3708952.pdf
    • http://files.digitalxraypros.com/uploads/1/3/0/7/130739646/f98919.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/sevokis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/78207486766.pdf
    • https://cdn.shopify.com/s/files/1/0431/3337/0522/files/2154057449.pdf
    • https://cdn.shopify.com/s/files/1/0441/1323/2024/files/25249370861.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34803766861.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/tafiwapa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/winoxilerudizixadejugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45287622464.pdf
    • https://cdn.shopify.com/s/files/1/0433/4020/2142/files/vosemopewod.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/vemiduwaradinubeved.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_off00008e5e.bin
94fb19d12e08f0bed29feb131439ebcc73f79b6dadbe18247af81e3c70edb779
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5E 5080 bytes
font_01_sfnt_off00009fad.bin
6b706029edf3753d91b44d4d56891cf786d3dd233c22608ab8fa3f377c4b0bf8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FAD 10172 bytes