Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db428947c4f48e8…

MALICIOUS

PDF

40.6 KB Created: 2020-08-31 17:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f4abf5801d95e51f20c111a2d5677b4 SHA-1: b2acadf1665f3ab5a0e3cec3c735b2a292f8c758 SHA-256: 8db428947c4f48e85f290028cd4fd348d9019431506e3bb920ec0f13bd008871
128 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains text related to 'Hd background cb editing' and a call-to-action phrase, suggesting a lure. The presence of a large number of embedded links to Shopify, while many are benign, indicates a link farm strategy, potentially to improve SEO for malicious content or to host secondary payloads.

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=hd+background+cb+editing
    • https://cdn.shopify.com/s/files/1/0429/1900/2268/files/wibade.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/wejujedopobuzuwezinu.pdf
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/curriculum_development_theories.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/dulapixeni.pdf
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/lebekitigakazenaxoji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29426312843.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/37652133319.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/73219372810.pdf
    • https://cdn.shopify.com/s/files/1/0434/2218/7685/files/97587576376.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/84372628179.pdf
    • https://cdn.shopify.com/s/files/1/0458/6458/3321/files/hollow_weapons_ds3.pdf
    • https://static.usrfiles.com/ugd/b58d21_019d0d1a7d744ebe9bb494513b3059ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae65c72f6d064772b7a95a571fad0309.pdf
    • https://static.usrfiles.com/ugd/b8c837_30fd54937558457bb69c065553ce4808.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_off0000629d.bin
483cf8300a0c5ac9fd3f947972f17cc6a38445cbd8598c631f7c260ff779d225		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629D 5060 bytes
font_01_sfnt_off000073e2.bin
146af0744574f7f15ffd6f7b3bd005b8780af43fc52e34bfc30147bcf3d0c0ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E2 9864 bytes

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