Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1bc6e0f2cc3c361…

MALICIOUS

PDF

53.8 KB Created: 2020-08-21 16:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c66b7de6bf455901900818e0bce03ae7 SHA-1: fbfed928aade91d31339622abc5f0793e3cd3334 SHA-256: f1bc6e0f2cc3c361b37041e7f22c2e4bc25c6bc6d8ad2616feebd35f8ed0ca9d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also contains a high heuristic for a browser extension installation lure, suggesting a social engineering attempt. The embedded link directs to 'ttraff.cc', a known malicious redirector, which likely leads to further malicious content or malware download. The PDF also hosts a large number of links to other PDFs, potentially for SEO manipulation or to spread malicious content.

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=arcore+android+studio+sample
    • http://dilupa.countrygirlgiftsok.com/uploads/1/3/1/4/131407535/fe5a04d6fb36b.pdf
    • http://files.stitchedwithcare.com/uploads/1/3/1/3/131383624/dowumi-wefudazebukop-wivavin-tajewowe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/74516498737.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/xulagotaminenawifovakan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejukimuvili.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5229/files/13060343843.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3363/files/regipep.pdf
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/17085424461.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/54859370896.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/gloomhaven_rules_summary.pdf
    • https://cdn.shopify.com/s/files/1/0432/5441/5515/files/90s_party_flyer_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/80672336273.pdf
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/bolowozulidavopefewu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/65465749335.pdf
    • https://cdn.shopify.com/s/files/1/0428/7610/8956/files/1848662370.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.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_off0000931e.bin
fd4220823e92afa3cbfbc18ad46435d67f3ec28a4b41f51b0d785e22b5a7c788
pdf-font-stream PDF embedded font (sfnt) at offset 0x931E 5208 bytes
font_01_sfnt_off0000a4b2.bin
dc0e3a1470f607808725fa4ca9df09cebe6587fe4cac40755fe4537e3b7789cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B2 11052 bytes