Malicious PDF — malware analysis report

Static analysis result for SHA-256 55111d616ecfc687…

MALICIOUS

PDF

51.9 KB Created: 2020-08-18 21:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b02db1aaecd27ad6aece9a1c6a6d595f SHA-1: 7a1cf72169cf3de8daef97577a937b30b039c7e5 SHA-256: 55111d616ecfc6879c4529db1389cea4bf2085984c631c03c562f32430b75208
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector and others forming a link farm. The ML classifier also flagged this PDF with high confidence. The primary malicious URL is https://ttraff.ru/pify?keyword=black+headed+ibis+pdf, which likely leads to further malicious content or scams. The document body itself is heavily obfuscated and contains a mix of seemingly random characters and embedded URLs.

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.ru/pify?keyword=black+headed+ibis+pdf
    • http://nixej.jennypearlsboutique.com/uploads/1/3/2/8/132814930/f1309f8f3c4f3.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/silekizezimepajetidomok.pdf
    • https://cdn.shopify.com/s/files/1/0452/5981/7117/files/fur_elise_piano_easy_version.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/vedoxuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6359/7473/files/namaz_ka_tarika_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/23229731586.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0966/files/zuliba.pdf
    • https://cdn.shopify.com/s/files/1/0428/7060/3932/files/github_readme_image_size.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fisebupujavilugux.pdf
    • https://cdn.shopify.com/s/files/1/0439/7685/1614/files/mf_135_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000672a.bin
d98a864731848712876182213d8d1d09c388f9aa175918bbc34fa58366998b6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672A 5400 bytes
font_01_sfnt_off0000797b.bin
519d87debea8898d2f3671e2a7b3670cb5fa3cc69e8f9564650524a89da944cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x797B 12816 bytes
font_02_sfnt_off0000a208.bin
1bcd0dee3e1ea5e4c8396365750f2cef02f708af131f122ac475831e8e3d50de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA208 10416 bytes

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