Malicious PDF — malware analysis report

Static analysis result for SHA-256 9efff15f4a5f34ba…

MALICIOUS

PDF

40.5 KB Created: 2020-08-11 22:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f1d201364446291306a4bc2acefec3c SHA-1: 6c74d31b23feb77873da831fd79504690cb577f1 SHA-256: 9efff15f4a5f34bae348ab71a87033136a9ff399500aa49ea46e955d0d1b66bf
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, including a critical link to a known malicious redirector at 'https://ttraff.com/pify?keyword=bivariate+and+multivariate+analysis+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to external content. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking for malicious content.

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=bivariate+and+multivariate+analysis+pdf
    • http://nufug.livingstonia.org.uk/uploads/1/3/0/8/130814017/fuserobe_pazinarajinuvu.pdf
    • http://files.mylocalcbdstores.com/uploads/1/3/2/8/132815343/bipijupekizu-zowunovegakim-kijelixixobate.pdf
    • http://nededugo.crusadecavalryreenactment.com/uploads/1/3/1/4/131452903/gakazegexolazid.pdf
    • http://files.lcraigwilliams.com/uploads/1/3/1/4/131438348/moridul_zuguxigigi_jafawosem.pdf
    • http://files.unbeatenpathtours.com/uploads/1/3/1/0/131071067/valaniropeguk_refin_vuwovelile.pdf
    • https://cdn.shopify.com/s/files/1/0448/0407/9777/files/basic_english_words_for_daily_use.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/22117707519.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/jekirulomakowodakometogid.pdf
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/38005342705.pdf
    • https://cdn.shopify.com/s/files/1/0432/0913/0143/files/carefusion_product_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0435/3517/1738/files/46398659693.pdf
    • https://cdn.shopify.com/s/files/1/0441/2515/9576/files/feritozakexabulivupupa.pdf
    • https://cdn.shopify.com/s/files/1/0438/1055/4013/files/potizofaruvinip.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8280/files/63428203207.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/balada_unui_greier_mic.pdf
    • https://cdn.shopify.com/s/files/1/0429/0458/4355/files/vesapojidus.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_off00005fb1.bin
43d9c49d2ca9bc147e4e8cdb726a5fbb321be4a00d36cd98418240d07e89ef45
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB1 5400 bytes
font_01_sfnt_off00007203.bin
aa07ff19d585240a1630a52e345bbf9402b56fb8f6afe6f864c62b3d2f27f818
pdf-font-stream PDF embedded font (sfnt) at offset 0x7203 10216 bytes