Malicious PDF — malware analysis report

Static analysis result for SHA-256 5139a401252e9a59…

MALICIOUS

PDF

44.3 KB Created: 2020-08-17 04:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a506b04426ed4d8a979b18b44caed750 SHA-1: 3a968ccbd8ebdbe96d926d322c58649fbd306bef SHA-256: 5139a401252e9a59172b2adfc1085a8bd7118844895ad3362aa32be38ceb4710
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=mcgraw+hill+connect+answer+key+financial+accounting', is designed to lure users with the promise of educational content. The PDF also exhibits characteristics of a link farm, with numerous embedded links pointing to external resources, likely for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=mcgraw+hill+connect+answer+key+financial+accounting
    • http://files.waveloopart.com/uploads/1/3/2/7/132740343/883d0.pdf
    • http://files.pennwealthreport.com/uploads/1/3/1/6/131637014/sonori.pdf
    • http://files.crochetnecklacesbyconna.com/uploads/1/3/0/7/130740217/jowuriropajonif.pdf
    • http://files.carrera-classics.com/uploads/1/3/0/7/130739258/3300431.pdf
    • http://midisak.exoticlocations.net/uploads/1/3/2/6/132695471/bemejomonun_podew_wosekiwifiv_mefabo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7818/0257/files/pebawimazadinipoxagef.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/ninoretinomujunivedoti.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6160/files/kizonirobalukovekobiki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tedix.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/maricopa_county_probate_court.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0350/files/wojufinarebodatijebel.pdf
    • https://cdn.shopify.com/s/files/1/0428/4448/7836/files/vukokakafirobitunivazumiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/dixanitametoremafumi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/filmyzilla_bollywood_2019_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/xexukese.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/seismic_survey_methods.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/job_interview_question_and_answer_for_teacher.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_off00006eab.bin
901711b583ecc1cf56ab773d5aabf922eae2f6262cd66dc698a2f64811e92f9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAB 5404 bytes
font_01_sfnt_off00008127.bin
bca57b1acde695e05c6c7f956f055d82b79904ba889fbcd9eba75ce22ae10857
pdf-font-stream PDF embedded font (sfnt) at offset 0x8127 10240 bytes