Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56d9669c70c2019…

MALICIOUS

PDF

43.5 KB Created: 2020-07-29 03:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a65ae9f590e6903fa1d731436cab9339 SHA-1: d4f56224a20307f59de228028f622e7a24393a00 SHA-256: d56d9669c70c201988f2677d88efc8b51ca27ddc6ce090b0ff28f39e662bde73
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, designed to redirect users to malicious sites. One such redirector URL, ttraff.com, is explicitly flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'exercicios de biologia botanica pdf', aiming to trick users into clicking the malicious links.

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.com/pify?keyword=exercicios+de+biologia+botanica+pdf
    • http://files.lubbocknorthyouth.org/uploads/1/3/1/1/131164310/2980711.pdf
    • http://files.featherfallssoap.com/uploads/1/3/1/3/131398252/c4171b62e8ae.pdf
    • http://files.2520schooldays.com/uploads/1/3/0/7/130738753/2544836.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/ninaniwilepofubatufugidiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/53898603532.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/favofimolomarexomu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tavolotifejenirogamofiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/0124/2022/files/vemasirewakeliketupo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4722/files/buwapefatuzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/20063894887.pdf
    • https://cdn.shopify.com/s/files/1/0431/6030/5825/files/85719784321.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/95240390688.pdf
    • https://cdn.shopify.com/s/files/1/0437/0048/6312/files/85944317817.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4687/files/rudojuvakawigil.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/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tavoloti

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cca.bin
448be17fcad6eed429d28e5c4e59cdb9f893643df0b3110e7c93fadc4c3044d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCA 5276 bytes
font_01_sfnt_off00007ec3.bin
15b7e7ffc230ee84f479c76b2680d21784f50377a041ec942f79fdb5c4685b65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC3 9956 bytes

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