Malicious PDF — malware analysis report

Static analysis result for SHA-256 e16e5c1846abd9a9…

MALICIOUS

PDF

45.5 KB Created: 2020-08-10 02:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c31527a150cf6cd4476ba7c595f6a27 SHA-1: c0ffc5733a9c053c8bd44eb700ac6818ae54d064 SHA-256: e16e5c1846abd9a920bca2a0c5623802b627f9fdad2756f46fba7b8588add2de
150 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=numbers+in+japanese+hiragana+pdf, which is likely used to redirect users to malicious content. The PDF also contains a large number of external links, suggesting a link farm or SEO manipulation tactic to distribute malicious 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=numbers+in+japanese+hiragana+pdf
    • http://files.highlanddesignsstore.com/uploads/1/3/1/4/131408970/kafifuxijopab-pedogefireb-xofexe-nipel.pdf
    • http://nutut.bonehorn.com/uploads/1/3/0/8/130874493/xuberep_diwejukitap.pdf
    • http://files.donnchadhoconaill.com/uploads/1/3/2/3/132303410/dexovivi_sobedadev.pdf
    • http://files.authorkmdylan.com/uploads/1/3/1/1/131163683/9185406.pdf
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/elvis_presley_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/63331093505.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/bagudonadikezexerilazukot.pdf
    • https://cdn.shopify.com/s/files/1/0436/5372/6358/files/kidopubupifuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/2572/6625/files/mixejunelalek.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/project_appraisal_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/jobotapuzuluvopo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5463/5937/files/larovupusenovazuroni.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9412/files/harvest_moon_rom.pdf
    • https://cdn.shopify.com/s/files/1/0448/0339/1645/files/assessment_in_special_education.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/degrees_to_radians_python.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000597c.bin
eb78177fd5575abb744ac0278be4a6e1b7717a1c2946764c6e5da847168610fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x597C 5300 bytes
font_01_sfnt_off00006b4a.bin
75004c51475debf8ee850dbc978f93a441a2129cd8327996792e163e603d0728
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4A 15180 bytes
font_02_sfnt_off00009ae5.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE5 4324 bytes