Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a1e9ca43d0001e8…

MALICIOUS

PDF

40.6 KB Created: 2020-08-08 08:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85c73cfb8fb23acdbeddf976f9963ded SHA-1: a3ee0781330375748bf738c6389fc2ba9fc2331b SHA-256: 4a1e9ca43d0001e883a35e1c8d66d886e1e9cb3c966b1154de72b64a7b6c2456
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=graduation+diploma+template+pdf'. This URL is presented within the document body, disguised as a graduation diploma template. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to improve search engine ranking for malicious content. The primary attack vector appears to be social engineering, luring users to the malicious redirector.

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=graduation+diploma+template+pdf
    • http://files.ibunson.com/uploads/1/3/0/7/130775137/mavabavifo_kuzikupap.pdf
    • http://files.wilmingtonprintandmail.com/uploads/1/3/1/6/131637057/cd8bc305482.pdf
    • http://files.messageinabottlebook.com/uploads/1/3/2/6/132682934/704582.pdf
    • https://cdn.shopify.com/s/files/1/0436/7260/0726/files/55386970875.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/talapulugomudu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/carlos_castaneda_the_art_of_dreaming.pdf
    • https://cdn.shopify.com/s/files/1/0440/0496/6565/files/keystone_rv_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/7292/8409/files/85119432764.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/rubikuzowadorobog.pdf
    • https://cdn.shopify.com/s/files/1/0433/3584/3994/files/17173672078.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/gokajinegajepidune.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/igbt_vs_mosfet_vs_bjt.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/zuwibivi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8004/8023/files/54151305961.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_off00006374.bin
7864fb992d08ea151230cbc7ce071222efb62b0ccbabb0c545049da16e4ff42f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6374 5040 bytes
font_01_sfnt_off00007487.bin
cf70c637d722c070beffc5d5e985ed4f335cf578f61f48c3996fb64123a67441		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7487 9748 bytes

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