Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e4b24ade3ac45b…

MALICIOUS

PDF

46.7 KB Created: 2020-08-17 11:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b3aeeffc4829ef253a9d39d20017a5a SHA-1: e07e494276cb66e713ac8fbb24e82813957591b0 SHA-256: 52e4b24ade3ac45b6d6196d1059aee4b101d31e84e76d3807912645ad2e61f1f
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL and text suggesting a lure for 'best free video editor for android 2019'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely to improve search engine ranking for the malicious link.

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=best+free+video+editor+for+android+2019
    • http://files.nationalschoolartcollective.org/uploads/1/3/2/7/132740905/7e1d1447f.pdf
    • http://files.paulmetcalf.net/uploads/1/3/1/4/131408204/fuzevato_vikasulisosora.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/bakuzefetu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/75648790896.pdf
    • https://cdn.shopify.com/s/files/1/0433/9980/7126/files/jedizubaluf.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/badiduvupasimolus.pdf
    • https://cdn.shopify.com/s/files/1/0440/2675/7270/files/project_on_casein_in_milk.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/sixubolimos.pdf
    • https://cdn.shopify.com/s/files/1/0432/9157/4430/files/walter_mitty_story.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/44765655307.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/12474520080.pdf
    • https://cdn.shopify.com/s/files/1/0432/9390/0968/files/antas_ng_wika_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pufabupenidobuxix.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/bandler_richard.pdf
    • https://cdn.shopify.com/s/files/1/0435/1148/0472/files/44138776650.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_off000078a4.bin
b42d31d64ea39cda920f02b8aca005e5be4a0ffeb335497b259678334d18249e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A4 5460 bytes
font_01_sfnt_off00008b4d.bin
c885cabd9d03bdc5f6fada8c2fda631bd542dd0d6093398369b65091f13dc8fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4D 10056 bytes

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