Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ecce08dcc73ce7…

MALICIOUS

PDF

39.9 KB Created: 2020-08-06 13:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 860fadb58bdf3f10c51bcf001b0a7b1e SHA-1: abcecfd27aa405e545207304e87d8afdd2da281a SHA-256: 03ecce08dcc73ce7857ff2212cbe49d1cb2f282bb2ba19bdfd42a374606ea83a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=british+council+games+pdf'. The document body, though heavily obfuscated, contains text suggesting a lure related to 'British council games pdf'. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=british+council+games+pdf
    • http://files.keyboards.es/uploads/1/3/1/6/131637876/batujav_defalazisa.pdf
    • http://files.greentarafarm.com/uploads/1/3/2/7/132740418/zamanamulokuwexugure.pdf
    • http://files.maxthemobileman.co.nz/uploads/1/3/0/9/130969426/afe9248.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/3901/2502/files/3594042587.pdf
    • https://cdn.shopify.com/s/files/1/0441/2456/9752/files/93215950367.pdf
    • https://cdn.shopify.com/s/files/1/0432/7119/2732/files/fijokubefitibanigivef.pdf
    • https://cdn.shopify.com/s/files/1/0430/4322/5751/files/54897523570.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1285/files/52469345592.pdf
    • https://cdn.shopify.com/s/files/1/0430/8100/7255/files/90096798047.pdf
    • https://cdn.shopify.com/s/files/1/0431/9114/0512/files/cqb_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7058/6006/files/fomita.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/botodegulesi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e7d.bin
0344f62a91fac1d4d9e2e691c6f1c30a4a32c42b0f321130fb88997745740e4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7D 5616 bytes
font_01_sfnt_off0000716e.bin
23049d214ae525ed371f3bba78a90321e66578225a93853f21c5e10a1df8d721
pdf-font-stream PDF embedded font (sfnt) at offset 0x716E 9780 bytes