Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6602797443f37f…

MALICIOUS

PDF

35.2 KB Created: 2020-08-30 20:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dfa4eace5a28f1f854def4fa23b96af SHA-1: 2d9e59cc0594b3c5f8cb6432ac713e5f9a4afb4d SHA-256: 1f6602797443f37fa0bdf8e3cbcd56776b281e4639f20adf1d2b14f10e09166c
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and appears to be a lure related to a product name. The presence of numerous embedded links, many pointing to Shopify, suggests a link farm or redirection strategy. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=cookworks+13+piece+super+slicer+manu
    • https://cdn.shopify.com/s/files/1/0429/1959/2099/files/4138634736.pdf
    • https://cdn.shopify.com/s/files/1/0433/4125/0714/files/ntpc_group_d_admit_card.pdf
    • https://cdn.shopify.com/s/files/1/0439/4024/9755/files/84183509465.pdf
    • https://static.usrfiles.com/ugd/5899d5_04fa775a20ce42b3b32daf5acaf06451.pdf
    • https://static.usrfiles.com/ugd/b8c837_05e8dd3f692e42dd9d7b98aabf6b5b1c.pdf
    • https://static.usrfiles.com/ugd/516574_e01124e8f54745a1a75b7722170f4532.pdf
    • https://cdn.shopify.com/s/files/1/0434/1039/1207/files/tukujavu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5395/files/49684634445.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3814/files/tibco_jaspersoft_reporting_and_analytics_for_aws.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/vidamedukibugalexekon.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_off00004b5f.bin
586b539a98fbb5199c6f91eb8480e6875d585c1c33c9379347c75d2f9dd58cb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B5F 5356 bytes
font_01_sfnt_off00005d92.bin
e50a5c9b5944d8a17a95163b80495becd8178f9eb33516c4b593d4d64e06da24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D92 10156 bytes

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