Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c64b232dd60a55c…

MALICIOUS

PDF

35.8 KB Created: 2020-08-19 13:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 649f70e3463f909fa2c785894b8e214d SHA-1: 9518d204543eaa64d814d87e2d449db40131cb25 SHA-256: 3c64b232dd60a55c7cd13ffaa0f9f8625bb352071d3baa575f5a4f52ac820a07
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=glencoe+health+chapter+3+assessment+answers', is designed to lure users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The primary intent appears to be directing users to the malicious redirector under the guise of providing assessment answers.

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/pify?keyword=glencoe+health+chapter+3+assessment+answers
    • http://files.teresacarosa.com/uploads/1/3/0/8/130814254/8407900.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5308/files/godefimufowidesu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8186/6143/files/2009_jetta_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6472/1562/files/boiling_lake_dominica_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/midna_true_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/mike_vick_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3713/files/wipokeweputitanadefa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/rikakikanomogijatino.pdf
    • https://cdn.shopify.com/s/files/1/0435/4624/7332/files/23213192991.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/32786674487.pdf
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/wakisuzasijitomoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/8611/0110/files/zotubidix.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/70396324616.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_off00004f84.bin
6a9f5c5d4f31c4094f5945cd314b764dcc1752fcad167f5a4e33e39c870ed2ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F84 5460 bytes
font_01_sfnt_off000061fb.bin
1ab18fa25fb8f43dd5fdee74e64942aabff12a5bca5a2d2573fea53fd2ad1608		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FB 9512 bytes

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