Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3c6f82fd343a2d7…

MALICIOUS

PDF

41.7 KB Created: 2020-09-01 00:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0506bf3117a89a07783737fac015550b SHA-1: 6808287984be5b25d3b1de030f704953ebb61461 SHA-256: e3c6f82fd343a2d731e0a8c15bf27081dc2b5685da1d0fc8be1f3e5ea140b654
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=consecutive+integers+problems+answers', which is likely intended to trick the user into clicking it. This behavior suggests a phishing or credential harvesting attempt, masquerading as educational 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.cc/pify?keyword=consecutive+integers+problems+answers
    • https://static.usrfiles.com/ugd/b8c837_c1dfa2099d0c4f6b800eb0b7ddb1a480.pdf
    • https://static.usrfiles.com/ugd/824332_3e833cc1906640feb6e464a364fb99ec.pdf
    • https://static.usrfiles.com/ugd/b916f4_c4addc0757fe47919437d3e9b2f1fe4c.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_34244a133b084256bbfbe6d7b7d06116.pdf
    • https://static.usrfiles.com/ugd/b8c837_30297933327744d3952ed34545a7ef9e.pdf
    • https://static.usrfiles.com/ugd/12dc78_97efdcefb4a94a58a405224c9aadead6.pdf
    • https://static.usrfiles.com/ugd/f0e51d_d85b3b9e82184583aa9d014aec552602.pdf
    • https://static.usrfiles.com/ugd/a640e9_dee30920f2714ae1a1643969e269a583.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/sidibafasivimov.pdf
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/geluwefasadosaniwanoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/82641294362.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/95271624264.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4872/files/nebip.pdf
    • https://cdn.shopify.com/s/files/1/0431/7095/5424/files/job_interview_script.pdf
    • https://cdn.shopify.com/s/files/1/0437/7267/4209/files/expectancy_theory_of_academic_performance.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_off00005d89.bin
5a448cf891387223370e056e5dc4c9716ea1831cb0afb1c734e0454960293fd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D89 5452 bytes
font_01_sfnt_off0000700c.bin
684961fdec557f9cc50786be1380d71a9c0422c9955303f9aa219cdf858633ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x700C 13288 bytes

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