Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e89eeb70a50c43b…

MALICIOUS

PDF

42.8 KB Created: 2020-08-23 04:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3118c96450577f8be58160c3cb846753 SHA-1: c989b3434cefa6221e1dd72d75e9c86d2d18f403 SHA-256: 5e89eeb70a50c43bb47b85e60bb54788b56c55dc70b425baddedb95b0d3a805e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=global+reporting+initiative%2528+gri+standards+core+option'. The ML classifier strongly indicates maliciousness, suggesting the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.ru/pify?keyword=global+reporting+initiative%2528+gri+standards+core+option
    • http://files.eraillinois.org/uploads/1/3/2/7/132740763/fejeme.pdf
    • http://files.scigo.co.uk/uploads/1/3/1/3/131381363/sefoxerutu_wenamo_sasodonoki_nojapitobefuti.pdf
    • http://felanazuj.krowncues.com/uploads/1/3/2/6/132681670/3894365.pdf
    • http://files.inhometherapeuticmassage.com/uploads/1/3/2/7/132712080/libofu-pusefur-didale-wizunajonode.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7361/7576/files/cv_template_free_word_2019.pdf
    • https://cdn.shopify.com/s/files/1/0462/5619/3687/files/sidarez.pdf
    • https://cdn.shopify.com/s/files/1/0428/6654/0711/files/34706067816.pdf
    • https://cdn.shopify.com/s/files/1/0430/7487/9641/files/wekejosoxodib.pdf
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/16663472749.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/concept_of_balanced_scorecard.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/cauchy_schwarz_inequality_problems.pdf
    • https://cdn.shopify.com/s/files/1/0429/6392/7203/files/75288903949.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/91721469454.pdf
    • https://cdn.shopify.com/s/files/1/0450/8326/3141/files/capital_market_download.pdf
    • https://cdn.shopify.com/s/files/1/0450/9528/8984/files/katolight_generators_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0438/1802/5122/files/patient_medical_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/43374485916.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006868.bin
65a3ed01ed2bebdd4de0ac80106a721360726bd643cc98bba0898e1f4e34ccfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6868 5548 bytes
font_01_sfnt_off00007b5e.bin
ea71269cf0152ef26e676b2834f12afdeda3b39e7e6de9002d4b0d1474f881fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5E 10120 bytes

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