Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ad476ec0e3740e…

MALICIOUS

PDF

39.4 KB Created: 2020-08-08 22:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d4ac4636d0d09583e26333448b69a17 SHA-1: 08707ccdc6ea49de49a340b16c58f2e49263478a SHA-256: c4ad476ec0e3740e29c4399183e0cbb79303f6c83d711e1f29805bd3d75adcb2
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is designed to lure users into downloading further malicious content. It also features a link farm with numerous external PDF links, many hosted on Shopify, likely for SEO manipulation to improve search engine ranking for malicious downloads. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=cambridge+checkpoint+mathematics+teacher+s+resource+8+pdf+free+download
    • http://files.rockingcleatherandboutique.com/uploads/1/3/1/3/131383510/7375545.pdf
    • http://vijig.elitelinesny.com/uploads/1/3/1/4/131437919/jagezinoliditepi.pdf
    • http://files.kinglobby.net/uploads/1/3/0/7/130739456/kexezejewibe.pdf
    • http://files.rosminicentrewisbech.org/uploads/1/3/1/4/131408415/jafujulo.pdf
    • http://files.generationjobless.eu/uploads/1/3/2/6/132681336/zefelojuvuk-fuvenojulaf-rodawudu.pdf
    • https://cdn.shopify.com/s/files/1/0439/5198/0712/files/16014225881.pdf
    • https://cdn.shopify.com/s/files/1/0435/7062/6723/files/mapa_geologico_de_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0438/5089/1424/files/54057671920.pdf
    • https://cdn.shopify.com/s/files/1/0429/5393/2966/files/gebixuwinulubak.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/doloxito.pdf
    • https://cdn.shopify.com/s/files/1/0432/5172/8546/files/78883039033.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2479/files/wagitirodekotusa.pdf
    • https://cdn.shopify.com/s/files/1/0440/4976/0406/files/fake_drivers_license_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/6141/8913/files/semetizovut.pdf
    • https://cdn.shopify.com/s/files/1/0437/2548/8279/files/file_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sopituwoxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3681/files/tubolikebodimomifibuvelas.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/calculus_analytic_geometry_larson.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/files/85781015403.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/
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000584a.bin
55f4e30f72e441b20e082dc76601bf3bd448a65057326512f4b5f50843e4f2ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x584A 5964 bytes
font_01_sfnt_off00006c74.bin
4683bece6d18832ffb5b5715e96e3aabec0a98d2b903de5f6b0cea963fb7eb68
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C74 10472 bytes