Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2489e71a5db65f…

MALICIOUS

PDF

40.2 KB Created: 2020-10-07 01:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c84ac4314c6496195a459e6b1d07a264 SHA-1: 5e50068e89c5fa888ac3672cc08aeff4360e19ec SHA-256: 4a2489e71a5db65ff3330e788b17d8f2c7ef7f0ad9c16e8469627a2fab0ba165
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which, https://gettraff.ru/strik?keyword=beekeeping+project+proposal+pdf, is identified as a malicious redirector. The document's structure and numerous links suggest it functions as a link farm designed to funnel users to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/strik?keyword=beekeeping+project+proposal+pdf In PDF document text
    • https://site-1037909.mozfiles.com/files/1037909/zofuterijeb.pdfIn PDF document text
    • https://site-1037156.mozfiles.com/files/1037156/galerekavupazisukowepis.pdfIn PDF document text
    • https://site-1036699.mozfiles.com/files/1036699/jutisigatafoveduv.pdfIn PDF document text
    • http://files.dropintoinfinity.com/uploads/1/3/2/7/132710748/1554800.pdfIn PDF document text
    • http://mixasuxad.bychristinamarie.com/uploads/1/3/0/9/130969940/vofilafojesuzugeda.pdfIn PDF document text
    • http://xazefufod.31southgd.com/uploads/1/3/1/4/131455663/9311841.pdfIn PDF document text
    • http://files.kimberlylsimpson.net/uploads/1/3/0/7/130738852/7edea5ecf481.pdfIn PDF document text
    • https://site-1039898.mozfiles.com/files/1039898/13910208435.pdfIn PDF document text
    • https://site-1038863.mozfiles.com/files/1038863/sawuvojomi.pdfIn PDF document text
    • https://site-1038334.mozfiles.com/files/1038334/tisepinobomarabifo.pdfIn PDF document text
    • https://site-1039553.mozfiles.com/files/1039553/zogimakuvatoto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0382/9657/files/zisul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6131/2664/files/warm_front_weather_characteristics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1900/9189/files/coleman_mach_rv_air_conditioner_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0108/4566/files/az_state_fair_concerts_2020.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E2 5300 bytes
SHA-256: 3a3830da68f04eae20811110041189ec50015b644e3cc3aa2c05c44af61d5e71
font_01_sfnt_off000074f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F8 10136 bytes
SHA-256: 902e3f79dcd50d4b2b4663d290ab96e1ceeb14bdeb71ed1566edf43339e9e835