Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c9905aa3ab0af2…

MALICIOUS

PDF

42.2 KB Created: 2020-08-20 10:38:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e0743459a706af40e72d6e5a258bcc9 SHA-1: c57d64dd469edce98dd564f259e2ad4c841a0b91 SHA-256: f9c9905aa3ab0af2cc08a84af41d319efcba4de15703aa9a571aa5fd5259792a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a mass of external links, many of which are hosted on Shopify and appear to be SEO spam. One critical heuristic firing indicates a direct link to a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document body text, though corrupted, contains the same lure text as the malicious redirector URL, suggesting the document's primary purpose is to drive traffic to this malicious infrastructure.

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=retrieve+deleted+text+messages+android+app
    • http://dazupesu.baytutoring.com/uploads/1/3/1/4/131438684/jivurumidakijogo.pdf
    • http://files.catholicplacemats.com.au/uploads/1/3/1/0/131070972/2ebfc3dcd5d2ae4.pdf
    • http://boneso.stfrancesbasketball.com/uploads/1/3/1/4/131453741/f71994dc8.pdf
    • http://bawelager.thecatholiccrusade.com/uploads/1/3/0/7/130776407/6542647.pdf
    • http://files.fbchurch.ca/uploads/1/3/1/4/131483830/870f3564c7892.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4457/files/37046543439.pdf
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/lexotilomuwuna.pdf
    • https://cdn.shopify.com/s/files/1/0431/7852/4832/files/haemolytic_anaemia.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/romoloxerokimukunurotufeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/xusojavapazifa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/77927538364.pdf
    • https://cdn.shopify.com/s/files/1/0429/2889/8211/files/yahtzee_java_code.pdf
    • https://cdn.shopify.com/s/files/1/0435/2668/4824/files/rusit.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1212/files/color_atlas_diagnostic_microbiology.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_off00006702.bin
9c3a3456344bf4490fac87b2c947316b126bbf6e587d0f73a5a8fc221fa25f24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6702 5416 bytes
font_01_sfnt_off00007962.bin
ad13d06e69d56e807a4eb24be93c2664bf9ae3c6da180c599e785a6cca629d5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7962 10120 bytes

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