Malicious PDF — malware analysis report

Static analysis result for SHA-256 8689b42311e44f78…

MALICIOUS

PDF

32.9 KB Created: 2020-08-31 03:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a0de1f2696ba2ece3df1b0660fd67b8 SHA-1: 9977a1eaed7629e57225f208789e63b091a48ffa SHA-256: 8689b42311e44f78d1dcb7b3fc31d62833b252412cc673baf433b4be732225b2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=georgia+milestone+study+guide+4th+grade'. The document body, though heavily obfuscated, also contains this URL. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation to mask the malicious redirector. No scripts were extracted from this sample.

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.ru/wix?keyword=georgia+milestone+study+guide+4th+grade
    • https://cdn.shopify.com/s/files/1/0429/6055/2089/files/484362398.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/95026443135.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4277/files/sistema_politico_socialista.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/juvolupafanokimurudegupum.pdf
    • https://cdn.shopify.com/s/files/1/0430/4276/7001/files/dpartement_et_arrondissement_du_cameroun.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6853/files/58561654050.pdf
    • https://cdn.shopify.com/s/files/1/0438/2857/6416/files/39502941417.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/videopad_5._01_registration_code.pdf
    • https://cdn.shopify.com/s/files/1/0436/1119/3501/files/facebook_networking_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0434/1107/9317/files/12630981765.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gobobuxewinunegurugita.pdf
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/kokutipimuxiwunajawe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/favamujesebenisavurudalal.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_off000042f8.bin
878f82e3561309435294723888df04e391c2d31439b69c2b97391a8c0b43824f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42F8 5460 bytes
font_01_sfnt_off0000556f.bin
0d9362e60b2361914f92dd941ba6e7b63511a3f8462d0953f896b2ff747d9ddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x556F 9380 bytes

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