Malicious PDF — malware analysis report

Static analysis result for SHA-256 42eedd7a7ab0c13b…

MALICIOUS

PDF

35.9 KB Created: 2020-08-06 12:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 045915ba453069c8e30b17b99d6a1648 SHA-1: b852464243db051b0153426ec85ca3bb8dd989e2 SHA-256: 42eedd7a7ab0c13bac93df5e28765e881d02816f6cbddce63604e9df6544b56c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify-hosted files, which is characteristic of a link farm used for SEO poisoning or to obscure malicious redirects. One critical heuristic firing confirms that a link points to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=calvary+temple+songs+book+pdf'. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=calvary+temple+songs+book+pdf
    • http://files.outsideportraits.com/uploads/1/3/1/4/131409017/e55beb539.pdf
    • http://files.matteodecassan.com/uploads/1/3/0/8/130874205/januzavogokat.pdf
    • http://files.targetswithattitude.com/uploads/1/3/0/7/130740378/5907936.pdf
    • https://cdn.shopify.com/s/files/1/0433/6166/5192/files/marsha_ambrosius_far_away.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4568/files/korean_to_english_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/rajenisuvad.pdf
    • https://cdn.shopify.com/s/files/1/0431/5512/8477/files/xumarozuvimipena.pdf
    • https://cdn.shopify.com/s/files/1/0437/5517/6088/files/ziziluz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/68045242997.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/kapepemixepezekasej.pdf
    • https://cdn.shopify.com/s/files/1/0439/4962/1406/files/vocabulary_lists_by_topic.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/12643461112.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mapitawaluzosamorexub.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_off00004eb5.bin
22200a43e621912dafde367f4046a680e8c6140bb9d84acfee5ab4498738255d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EB5 5632 bytes
font_01_sfnt_off000061d6.bin
d432afd498e15bca8293c6072bf55bdb79a05e62221663582351749d556a54de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D6 9768 bytes

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