Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8227557b98e946…

MALICIOUS

PDF

37.7 KB Created: 2020-08-19 19:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b92a6fca904fc82ff73001b81a147db8 SHA-1: 07eb4d3662d3555dec09042637db127c73f28206 SHA-256: 1e8227557b98e946f2bf1d012b9d051b52aac42f4d15bf0dce62b512e1748afe
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to further malicious content. The document body and embedded artifacts suggest an attempt to disguise the malicious link as educational material, specifically 'handwriting worksheets 2nd graders'. The presence of numerous other PDF links, many pointing to potentially compromised or malicious domains, further supports the malicious intent.

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=handwriting+worksheets+2nd+graders
    • http://walaz.simsburyband.org/uploads/1/3/1/6/131606419/aac09cd65c2b.pdf
    • http://wifebate.havayah.com/uploads/1/3/2/6/132682076/c0e2e936e.pdf
    • http://files.northspraychristianchurch.com/uploads/1/3/0/7/130738875/melifunidinuxavem.pdf
    • http://nofafapis.2findyourhomevps.net/uploads/1/3/1/4/131406082/wupedamidijalus.pdf
    • https://cdn.shopify.com/s/files/1/0438/8611/7032/files/chicago_manual_of_style_capitalization_tool.pdf
    • https://cdn.shopify.com/s/files/1/0429/1294/0188/files/31955503330.pdf
    • https://cdn.shopify.com/s/files/1/0449/6962/3711/files/popekuvidaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/antigona_analiza.pdf
    • https://cdn.shopify.com/s/files/1/0439/4418/1928/files/xofeniwim.pdf
    • https://cdn.shopify.com/s/files/1/0447/1989/8777/files/sufaxeramabi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7886/7358/files/gadapagemaxagamuxuxaso.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/11846241642.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9213/files/gat_analytical_reasoning_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/0487/0305/files/zbigniew_brzezinski_between_two_ages.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/12748222241.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_off00005418.bin
e060402d2db1c2c75dcd5e8fbee0a34c877870280999a74df1900fbcb5656a13
pdf-font-stream PDF embedded font (sfnt) at offset 0x5418 5304 bytes
font_01_sfnt_off0000662d.bin
65eb2ceb785f0db853956cdd905e7857b377324679944c82a5147f6a3db688fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x662D 10424 bytes