Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e9d6102efaff0e…

MALICIOUS

PDF

45.8 KB Created: 2020-08-08 04:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdcfa66f6f108031c0b4a1d307bbe82b SHA-1: 688572ad010325702f9ae48c1df72b0e2e54cf25 SHA-256: 34e9d6102efaff0eb836457a6f85e3de87ba538134318a80718dedb45ba23a4b
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are SEO-optimized lures pointing to PDF files. One specific link, https://ttraff.ru/wb?keyword=instructional%20technology%20and%20media%20for%20learning%20pdf, is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wb?keyword=instructional%20technology%20and%20media%20for%20learning%20pdf
    • http://files.leonmccarron.com/uploads/1/3/1/4/131452988/a74a4a78bfdd23.pdf
    • http://files.susanmckayartist.com/uploads/1/3/1/1/131163540/4619159.pdf
    • http://files.rojossports.com/uploads/1/3/0/8/130873826/somimi-keguxogaxura-nilesanotejo.pdf
    • http://files.forestecotherapy.com/uploads/1/3/0/7/130739593/32f52a90bb3.pdf
    • http://nugusi.millersgardenservices.co.uk/uploads/1/3/0/8/130814575/xajaselejediwef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/profit_and_loss_account_and_balance_sheet_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1323/files/49184083369.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/98529834421.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/44075178727.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0296/files/fefikilelokulokud.pdf
    • https://cdn.shopify.com/s/files/1/0438/9086/8379/files/luxuledunuxamidokadinupe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/zuvetimiwutitemux.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/86042760545.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/65981312186.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/josogoxujopufudejutudimo.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_off000072bf.bin
05dc6e089f601fb672b627c9f82447667cb54ac586d6fc838c74730fc54c00c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72BF 5608 bytes
font_01_sfnt_off000085b2.bin
2f64b773293bd277635da7e5ad22815f04782802e38abe73ea6eb2dd02c01859		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85B2 10644 bytes

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