Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a422d54312bbe8f…

MALICIOUS

PDF

58.4 KB Created: 2020-08-30 15:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b4c656fd28eb93f2216cffb947cc06d SHA-1: cbf2d1a0f1e1e76517f4fc4ed4c30b26a40f420a SHA-256: 4a422d54312bbe8f1d8ac25c234a3fe7560240c3a2315cbb7d9597e9c374b76b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems

The PDF contains a significant number of embedded links, many pointing to Shopify domains, which is indicative of a link farm. One of these links, 'https://ttraff.com/wix?keyword=best+armor+witcher+3', is flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to potentially harmful content through this link farm. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=best+armor+witcher+3
    • https://cdn.shopify.com/s/files/1/0430/1137/5267/files/58857166064.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/5859384877.pdf
    • https://cdn.shopify.com/s/files/1/0451/9398/6199/files/jamabidame.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/que_es_el_calvinismo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/trinity_core_gm_commands.pdf
    • https://cdn.shopify.com/s/files/1/0461/7640/3609/files/kokokopisumadevafadawegax.pdf
    • https://static.usrfiles.com/ugd/7603ae_d4c70b5896c6493b98868bd3ff42b453.pdf
    • https://static.usrfiles.com/ugd/73c254_1eab77f8721d42d691e2875b84315f2b.pdf
    • https://static.usrfiles.com/ugd/61f964_cd95b7dba08a4832b3a5bb02058d3f2b.pdf
    • https://cdn.shopify.com/s/files/1/0439/4693/4430/files/screen_capture_from_video_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/boolean_algebra_rules_and_theorems.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5457/files/punaxonigifibabi.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_off0000a83b.bin
423d2be13bc319cebab7f89038122f61073cb9f1284272efe94b758e914f4b88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA83B 5312 bytes
font_01_sfnt_off0000ba38.bin
e124503cb9b205a9feb8fdc9fd7643f21aa089f9c6198313bff840b4ba6688c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA38 10300 bytes

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