Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c8be00b8eeac94…

MALICIOUS

PDF

44.3 KB Created: 2020-08-25 09:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 877dace8174479c83d089adfb53b74dd SHA-1: 35f13464b7a738ef42c0f58ccdb267cca3798598 SHA-256: 33c8be00b8eeac944b6494ec65c090420ea667d423bb96c178ad9d1d4cdf4043
160 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 'ttraff.ru', which is presented as a chess puzzle app advertisement. The document also exhibits characteristics of a password-protected archive lure, suggesting it's a delivery mechanism for further malicious content. The embedded URLs and the document body content reinforce the social engineering aspect of this attack.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=chess+puzzles+apps+for+android
    • http://files.mormonwomenshistoryinitiative.org/uploads/1/3/1/4/131406068/gudepale-junema-nanuze-bixef.pdf
    • http://files.allinonerenovationsllc.com/uploads/1/3/1/3/131398423/toxof_lorozuzezitone.pdf
    • https://cdn.shopify.com/s/files/1/0435/9025/4749/files/20103640353.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3674/files/tinkle_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0440/8904/9238/files/53459282981.pdf
    • https://cdn.shopify.com/s/files/1/0441/4518/0824/files/lebetelexevevom.pdf
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/zegegofumajimubiwen.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0687/files/shapeless_with_a_root_of_a.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90685258811.pdf
    • https://cdn.shopify.com/s/files/1/0434/1311/0951/files/nopenapedukagafo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2347/3560/files/wuvunedozupijid.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2887/files/suzipovi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4191/2997/files/zebunawizan.pdf
    • https://cdn.shopify.com/s/files/1/0431/2770/1655/files/62236345707.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_off00007041.bin
0fbc562d97211281df7446a928f939614622581d815500d0945870362ec65648		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7041 5084 bytes
font_01_sfnt_off0000818c.bin
bd8f42db9d65da885da1f39d8f72df64a9132f050fe49fc2c8db1135832c8763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x818C 10292 bytes

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