Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6e6bb52785da0a…

MALICIOUS

PDF

35.0 KB Created: 2020-08-12 07:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bd4d98147fab1bb389cf1b59c5b88e2 SHA-1: a14eead00b6bab104749f3488c0afc9338037b6a SHA-256: df6e6bb52785da0a339a18d83529a5e0bb2c953e4f6a71eff50656da5db59a23
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that matches this redirector. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on Shopify but some point to unknown domains that could host further malicious content. 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=past+simple+regular+and+irregular+verbs+exercise+pdf
    • http://luvagaget.sgidistributorsltd.com/uploads/1/3/1/6/131636725/godulujilut_selerukixasoxaj_wekogubisa.pdf
    • http://files.nikiachaney.com/uploads/1/3/1/4/131438137/fiwixow.pdf
    • http://files.catledgeconcepts.com/uploads/1/3/1/3/131398526/5233405.pdf
    • http://tibevixow.ricrna.com/uploads/1/3/1/6/131637240/zolevodabir.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8765/files/types_of_genetic_mutation.pdf
    • https://cdn.shopify.com/s/files/1/0437/8837/0072/files/disney_mission_statement.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/20392794163.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/65511028556.pdf
    • https://cdn.shopify.com/s/files/1/0432/8764/2267/files/zenekoresuvedodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/tojuzox.pdf
    • https://cdn.shopify.com/s/files/1/0433/7729/5516/files/16771597976.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/nibujesusigusodulula.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/89565392758.pdf
    • https://cdn.shopify.com/s/files/1/0435/8776/4387/files/zafagu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/76054850202.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/79887234476.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_off00004981.bin
8bb827b9c86c99f65dc0616969d84a1b464b71bf754972480c52e4fc6c3353c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x4981 5744 bytes
font_01_sfnt_off00005cef.bin
95f28d8126ef3ce543359c680cf5bd5129ab94c452cc2e6c3e0ecf0bf9816d66
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CEF 9908 bytes