Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09613ee5f11ff91…

MALICIOUS

PDF

39.3 KB Created: 2020-07-19 03:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c34b42cc176f88d2efc837a0c2b5f9f4 SHA-1: e1ffde00ab346da5d139e8fa6a3c0606148ceea6 SHA-256: d09613ee5f11ff9169aa3618de1e89a0a045ad71b878d33ac40deb4540d8d3d5
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for an 'icse chemistry book for class 11 pdf'. This link points to 'ttraff.cc', a known malicious redirector. The document also features a large number of external PDF links, many hosted on WordPress, likely part of a link farm to improve search engine ranking for malicious lures. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=icse+chemistry+book+for+class+11+pdf
    • http://files.sfxfaithformation.org/uploads/1/3/2/7/132740533/vijuzazevudutepe.pdf
    • http://files.oslomamma.net/uploads/1/3/1/8/131856112/velomuj-gugodaluzomep.pdf
    • http://files.biocharireland.com/uploads/1/3/1/8/131856624/a8cb991ddb94.pdf
    • http://files.whitelandchoirs.com/uploads/1/3/1/4/131406855/dorawarodava.pdf
    • http://files.sfxfaithformation.org/uploads/1/3/2/7/132740533/vijuzazevudutepe
    • https://rizuxagojagu.files.wordpress.com/2020/06/39542360745.pdf
    • https://dajajotunur.files.wordpress.com/2020/07/zogerufonidexafaxi.pdf
    • https://putigip.files.wordpress.com/2020/07/6686737981.pdf
    • https://kifageve.files.wordpress.com/2020/07/55879447022.pdf
    • https://lexokafoje.files.wordpress.com/2020/06/xozebisafarafinukire.pdf
    • https://xudawipopa.files.wordpress.com/2020/06/rujodusapokijumujigozixew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32177526878.pdf
    • https://cdn.shopify.com/s/files/1/0434/2425/2055/files/40929351901.pdf
    • https://cdn.shopify.com/s/files/1/0435/3844/8548/files/zuzemorixusifopoxuzubi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7812/2649/files/podus.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/48818492621.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/lugumilirevisivovedan.pdf
    • https://cdn.shopify.com/s/files/1/0432/2492/4319/files/rofaforesi.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_off00005bc3.bin
256fbede5f6f7a7eb2216d2fabf28ea8974f0103621f376b5170680af40317e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC3 5372 bytes
font_01_sfnt_off00006dfc.bin
a7d35e578c85b2e3f237092cf723df6e33479d92d2332dddf9df8ce19830d9f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFC 9932 bytes