Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32ecbef89ff9883…

MALICIOUS

PDF

43.8 KB Created: 2020-08-10 18:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e8283049937a9af6a0d3f6a56fe9557 SHA-1: 3c6afc65779f92ed5082fb0a5442870cc0789883 SHA-256: a32ecbef89ff9883c4f3dddd35d442d604c5f323c23c41eb7fc6aa5f7f069e05
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the text 'Gen z slang list pdf' and the malicious URL, suggesting a lure. The PDF also contains a mass external PDF link farm, with many links pointing to Shopify domains, likely for SEO manipulation or to host further payloads. The primary malicious IOC is the redirector URL.

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=gen+z+slang+list+pdf
    • http://files.miriamruberlartist.com/uploads/1/3/1/4/131483019/828517e6fc26dc2.pdf
    • http://files.lumenctr.org/uploads/1/3/1/8/131871796/vatebobunaxu-sikuzoxupe-xebenujin-neruzomusame.pdf
    • http://nutifozo.utbizreview.com/uploads/1/3/1/6/131606552/c9c904ace336.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/cabalistic_encyclopedia.pdf
    • https://cdn.shopify.com/s/files/1/0434/0334/6078/files/41243997010.pdf
    • https://cdn.shopify.com/s/files/1/0435/2229/3920/files/zazuxefoxodadamonovuzerut.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/bioaccumulation_and_biomagnification.pdf
    • https://cdn.shopify.com/s/files/1/0432/9757/0980/files/pigezekelogidomaseguzaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8338/2427/files/45389412426.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4661/files/kazejeparonudoja.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/gatosa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5128/files/zakobifivok.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/98854062154.pdf
    • https://cdn.shopify.com/s/files/1/0439/1511/6696/files/tongue_twister_generator.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_off00006e8f.bin
f6753f0ff2359a5a3677235b30381f34ddb9a747c66019fdf910ef57bddcebc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8F 5196 bytes
font_01_sfnt_off0000805c.bin
0d80f2b2f5049c6b747234ee4616694ce13efda6f7767c22eb2f128109d5291b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x805C 10096 bytes

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