Malicious PDF — malware analysis report

Static analysis result for SHA-256 300a11f89459d1ff…

MALICIOUS

PDF

40.6 KB Created: 2020-08-30 15:39:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 058e5497ffb5cf75c82017372da90a8d SHA-1: f4732cc6ab05d66b116bc19fdf06c772d17f5e37 SHA-256: 300a11f89459d1ffc4fd55e7be3b49f1ea73cdca7b269c25f3c10fac7fdec204
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to Shopify-hosted PDF files. One of these links, https://ttraff.com/wix?keyword=friday+the+13th+vengeance, is identified as a malicious redirector.

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=friday+the+13th+vengeance
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/rolipevor.pdf
    • https://cdn.shopify.com/s/files/1/0437/1516/6357/files/biomaterials_science_buddy_ratner.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4682/files/sitogi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/charter_tv_guide_st_louis.pdf
    • https://cdn.shopify.com/s/files/1/0433/7975/3121/files/wekogapafaxuvirajegeguxov.pdf
    • https://cdn.shopify.com/s/files/1/0438/4443/6128/files/augustine_city_of_god.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/64827595299.pdf
    • https://cdn.shopify.com/s/files/1/0433/3391/0681/files/clcss_latest_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0446/9296/3484/files/hyphenated_analytical_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0464/9143/5176/files/final_fantasy_brave_exvius_guide_espers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8520/9506/files/9186859667.pdf
    • https://static.usrfiles.com/ugd/b47706_50d58238734044fbab884ae0d9bd4dad.pdf
    • https://static.usrfiles.com/ugd/72216b_303c3d59a68f438bb97d3f6f57ab51ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_5bce332ee5b64ffbb48fa358c04ce955.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_off0000606f.bin
211a3b3602bdb9563d7f71303d7c8aa2f373d754927b8bbb6ffc8a7ce2a718a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x606F 5324 bytes
font_01_sfnt_off0000729c.bin
2ecf4d6eca5d071fb134e62d14afe2a8fb906e52e9e5ecf17ebc2dffda0e9d17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729C 10292 bytes

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