Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d1be8940c85652…

MALICIOUS

PDF

52.4 KB Created: 2020-08-07 06:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aacdfc1e78195511ece5b108f87ac024 SHA-1: 6748553c84deb06bb0d6caf7ea765757ecb33bca SHA-256: b0d1be8940c856525704c7f2aba14d77fad366a49754bb6abf76861dcbb0a7c1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell 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 text related to 'creative writing skills' and the malicious URL, suggesting a social engineering lure. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to a malicious site via the embedded link.

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/pify?keyword=how+to+improve+creative+writing+skills+in+english+pdf
    • http://files.carpenterschool.org/uploads/1/3/1/4/131483361/8061639.pdf
    • http://files.jinshorestaurant.com/uploads/1/3/2/6/132682745/wadoruku_redegapab_wixas_vapovorupogo.pdf
    • http://widedexo.brantinghambca.com/uploads/1/3/2/7/132740873/warekafudi-zujevopu-bujarati-datinokobisafu.pdf
    • http://files.balduin.org/uploads/1/3/0/7/130738933/pepet.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/nz_shooter_manifesto.pdf
    • https://cdn.shopify.com/s/files/1/0430/8022/0826/files/drinkwell_platinum_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0431/4949/2384/files/demande_d_aide_au_logement_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/2888/8217/files/youtube_to_ringtone_iphone_app.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/61484370839.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6413/files/free_magazine_download_sites.pdf
    • https://cdn.shopify.com/s/files/1/0433/5602/9093/files/terraria_armor_tiers.pdf
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/lesuxadaropijamazuji.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/tetivipukokafejovuxokej.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/ramolipi.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_off00008dec.bin
27142e76bd2c1d68a286db619dbb5374e85e7e4a85a7afd46f42e1ab004f7e68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEC 5748 bytes
font_01_sfnt_off0000a167.bin
6f0dba84505282b9f9063189024b605b0231eb5a8ecaf5bbf6b9b4e76c5f1182		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA167 10032 bytes

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