Malicious PDF — malware analysis report

Static analysis result for SHA-256 3135b5f62a890ecd…

MALICIOUS

PDF

41.4 KB Created: 2020-08-15 04:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a7e4055e0a6798938992c2fd5537067 SHA-1: feef011844b6b3b8b6c438c185aef7a0c5556631 SHA-256: 3135b5f62a890ecdb39568fd7d5f35edfc0e856896182f760aea43593b3d01c1
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=autoformation+en+anglais, suggesting a lure for users interested in English auto-formation. The redirector likely leads to a malicious payload or phishing page.

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=autoformation+en+anglais
    • http://fitunuzu.cybersoftinfosys.com/uploads/1/3/1/4/131407089/kanibatunugasegir.pdf
    • http://files.otticacastelli.com/uploads/1/3/1/3/131383619/dikul.pdf
    • http://files.themakeupartist.co.nz/uploads/1/3/2/6/132680915/add977deff24.pdf
    • https://cdn.shopify.com/s/files/1/0432/8207/1716/files/axis_and_allies_pacific_rules.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/10730194929.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3481/files/45267416566.pdf
    • https://cdn.shopify.com/s/files/1/0433/8555/3061/files/52865062969.pdf
    • https://cdn.shopify.com/s/files/1/0434/4492/8674/files/descent_into_avernus_tg.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5798/files/ite_trip_generation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61411835552.pdf
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/56957186953.pdf
    • https://cdn.shopify.com/s/files/1/0433/5593/0783/files/7667390827.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/nyda_application_form_for_employment.pdf
    • https://cdn.shopify.com/s/files/1/0433/4528/1183/files/69601959926.pdf
    • https://cdn.shopify.com/s/files/1/0439/2858/4347/files/82442735802.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/70792192710.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_off0000621c.bin
0dda99631d12797ecf54463cde1b755e61fb91077e54ffba7b7dbe9940669901		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621C 5076 bytes
font_01_sfnt_off00007345.bin
1f9c1cf2f8e1c735faaa647b5ae6db44ee7bd0528960565dc7fe96245f687ce4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7345 10944 bytes

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