Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee145f3568d2622…

MALICIOUS

PDF

50.9 KB Created: 2020-09-01 10:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20b13fe7f1e10a4f64372fc8a51e887e SHA-1: 5fe8f3e84a1624bc92d66ccd03c31c58c024bbdf SHA-256: eee145f3568d2622b3f6722d0a39d8a73583eda6dd585f18978ca362c13b4f7b
130 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a treatment guideline. The document also functions as a link farm, directing users to numerous other PDF files hosted on static.usrfiles.com. The presence of a 'download button' heuristic further suggests a lure to click on these links.

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.cc/wix?keyword=ankylosing+spondylitis+treatment+guidelines+australia
    • https://static.usrfiles.com/ugd/fd3290_2ea2e72271a84cbbbaef08525aed8857.pdf
    • https://static.usrfiles.com/ugd/3de8a6_a6b8b141a21d4a0dbfb340e4672a1820.pdf
    • https://static.usrfiles.com/ugd/ab059d_1bf38e4d79cb43a981843e747477e90f.pdf
    • https://static.usrfiles.com/ugd/e73fea_7c3f1a4aaa2348a3bb4d74b7f166d5f1.pdf
    • https://static.usrfiles.com/ugd/a01749_3e6ea16fef3540d6bec1e3da6a5c8af4.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/xuxujatutose.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/37678512627.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/plazas_spanish_textbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0462/6346/8189/files/minecraft_free_for_pc_java_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/modernidade_lC3ADquida_lelivros.pdf
    • https://cdn.shopify.com/s/files/1/0430/4266/8698/files/what_is_candy_for_in_miitomo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7863/files/zijuxotipe.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ebc31fccf7147f5b53ae8a6e3b817d9.pdf
    • https://static.usrfiles.com/ugd/3f0e57_78028384a7dd46a9b7f4e937b350c9c1.pdf
    • https://static.usrfiles.com/ugd/cac9e4_0884b20f18364a35be2e33ad352da56b.pdf
    • https://static.usrfiles.com/ugd/2e16aa_23942e52493e43808312d42fb5bba993.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://static.usrfiles.com/ugd/a01749_

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008802.bin
55e084162312d8b2496709ae78a1b6490e58cb381c8949d921aed38e3a6b54a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8802 5436 bytes
font_01_sfnt_off00009a79.bin
59a2e65bdd47e5d0409a43e4ed3a4d35c5e800002ee5f88da2e77af2d50ab540
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A79 10376 bytes