Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22daf47469b7ea9…

MALICIOUS

PDF

39.0 KB Created: 2020-08-21 04:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64001749da49b45e4133ebdb670c95f8 SHA-1: a61e2532b1a64bafb6826aad1d8fcd885e966911 SHA-256: b22daf47469b7ea98896171bcbcdd31d9cb6495082c08cd3be2c49c3e97fbf5a
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a worksheet answer key. The document body and embedded links suggest a lure to download further content. The PDF also hosts a large number of links to other PDFs, many hosted on Shopify, which is characteristic of SEO poisoning or link farm tactics to improve search engine ranking for malicious content.

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/pify?keyword=immune+system+and+disease+worksheet+answers
    • http://files.myvirtualvacations.net/uploads/1/3/0/7/130775971/c907b.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/pubatudixaxolenosanil.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/19466353078.pdf
    • https://cdn.shopify.com/s/files/1/0434/4070/1606/files/61722518188.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/arquetipos_del_inconsciente_colectivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/73945991929.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/20820723679.pdf
    • https://cdn.shopify.com/s/files/1/0432/4206/1986/files/70292493256.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/42362670741.pdf
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/compound_complex_sentences_worksheet_lesson_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/engineering_dynamics_jerry_ginsberg_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/1274/1525/files/california_dreamin_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/6018/9594/files/18585843119.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fdf.bin
4caeff701d796c37c2a74ccc453c116380bd3512edcea601eb66f5ff307ace05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDF 5112 bytes
font_01_sfnt_off0000611d.bin
de3f9c7087059fcea6235e197e831615795e43d37ed2f4d3d0d68509b0d540f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x611D 9376 bytes
font_02_sfnt_off00008117.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8117 4324 bytes

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