Malicious PDF — malware analysis report

Static analysis result for SHA-256 28bb34516a1d6df9…

MALICIOUS

PDF

42.8 KB Created: 2020-07-10 23:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65ed242643befdf7b0d256e6ff83e059 SHA-1: fdba5ebab7271d81adbf40ea764a2ca5b5c7589f SHA-256: 28bb34516a1d6df9b7f33031d61a8fa766c3e8bcd6ded22a08ca3cd1fdfae403
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, masquerading as search results for a dictionary PDF, which are designed to redirect users to malicious infrastructure. The primary redirector URL is https://ttraff.cc/pify?keyword=longman+dictionary+of+common+errors+new+edition+pdf. The document body itself is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf.

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=longman+dictionary+of+common+errors+new+edition+pdf
    • http://files.wildharvestfestival.org/uploads/1/3/1/0/131070488/02ab6986cb17021.pdf
    • http://files.lynnkirkham.net/uploads/1/3/0/8/130874318/6548217.pdf
    • http://files.dearborn411.com/uploads/1/3/2/7/132740860/xokagilo.pdf
    • http://files.neverwares.ca/uploads/1/3/2/3/132303138/zepepigale-bipejimip-kudarunuputa.pdf
    • http://files.makersguildinwales.org.uk/uploads/1/3/0/7/130775131/2319663.pdf
    • http://files.m-tacres.com/uploads/1/3/1/3/131379325/latatef.pdf
    • http://files.johnfolley.com/uploads/1/3/1/4/131452991/sunosivul-dotoxep-ketusajaxewel-sopigogoz.pdf
    • http://files.bryantphilanthropic.org/uploads/1/3/1/1/131163955/73fe9.pdf
    • http://files.gatewoodgraphics.com/uploads/1/3/0/8/130874647/rejutimuvapasise.pdf
    • http://files.changingfutures.org.uk/uploads/1/3/1/6/131606087/mufegesitawiko-matuwomap-xivekun-vokozufeletefuz.pdf
    • https://bivuzedowi.files.wordpress.com/2020/07/wupif.pdf
    • https://jidibabeja.files.wordpress.com/2020/07/nusupejagofenazex.pdf
    • https://vimolor.files.wordpress.com/2020/06/15549551465.pdf
    • https://negoxojes.files.wordpress.com/2020/07/jozetoj.pdf
    • https://xotagesison.files.wordpress.com/2020/06/66348005704.pdf
    • https://jelonidamu.files.wordpress.com/2020/06/17889541827.pdf
    • https://zuketuvilo.files.wordpress.com/2020/06/dikagezediwopeditisovo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/niveseriwonujogineje.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/sabozuj.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/
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/niv

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a21.bin
c92bdf80e24393d9d82190184675e1975e95cfb3aa7b0c01414c02ec23da8121
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A21 5364 bytes
font_01_sfnt_off00006c61.bin
2d9913f0c0b5613067d84e92781cb4a54d363c726ef1e162bcfc361eeca8708e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C61 19972 bytes