Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c8b69447b95e0bc…

MALICIOUS

PDF

44.1 KB Created: 2020-08-20 13:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81667c5c60cb83084a5042602bb838a9 SHA-1: 162419adfd626a65dc74e73ff3711bbacebddf94 SHA-256: 9c8b69447b95e0bc546c8a8938b10d025ce4db94c07d68e19a4c88732a544e1a
120 Risk Score

Malware Insights

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

The PDF file contains a link to a redirector URL, which is a common technique for delivering malicious payloads or phishing pages. The document body suggests a lure related to 'Cambridge written placement test answers', aiming to trick users into clicking the malicious link. The presence of a link farm further indicates a malicious intent to distribute content or traffic.

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=cambridge+written+placement+test+answers
    • http://files.currenteventcomedy.com/uploads/1/3/1/3/131383580/mukogubesejuka_jefotizogi_zajipu_fosiwixavijaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/gifenukigaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/50073568311.pdf
    • https://cdn.shopify.com/s/files/1/0431/7328/1948/files/hyundai_sonata_2013_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3382/files/internship_report_sample_petroleum_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/muzajufojamamofafekimot.pdf
    • https://cdn.shopify.com/s/files/1/0449/8790/8264/files/air_force_question_paper_2020_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/fenland_fisheries_catch_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/edital_concurso_prf_agente_administrativo_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/2772/5474/files/pivegexadaxeb.pdf
    • https://cdn.shopify.com/s/files/1/0440/1476/4190/files/91224753357.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/wumadezef.pdf
    • https://cdn.shopify.com/s/files/1/0435/4952/4127/files/68713934725.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7347/files/65284499162.pdf
    • https://cdn.shopify.com/s/files/1/0432/2328/5928/files/68562001669.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_off000062d9.bin
0702da1b9e630a5b601d1dab9f92dbf61cbcf434b238ff2b85785a8a31009923		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D9 5532 bytes
font_01_sfnt_off0000759d.bin
8f56d9b754809f13c506b3e55e3e838ef4237214e125303df3016ab154983b10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759D 15000 bytes

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