Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e903a2463abcd8…

MALICIOUS

PDF

41.2 KB Created: 2020-08-19 08:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0872510ac68987e2947424b782ddea50 SHA-1: 135b899df8992694c9cd9fdfb83470c55f008d11 SHA-256: 69e903a2463abcd8d646f48ebbd8b3e9bf2934c4933d0df12de46c4b59697d32
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 redirector service. The primary malicious link directs users to 'ttraff.ru', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains keywords related to financial statements and the URL itself suggests a lure for financial information. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly indicate a phishing or redirection attempt.

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=debit+credit+balance+sheet+excel
    • http://files.clydetownshipscc.org/uploads/1/3/1/6/131606631/rajaruvedudo.pdf
    • http://files.thewrighttribe.com/uploads/1/3/1/4/131410952/juxabanet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2544/9628/files/capricorn_woman_scorpio_man_yahoo_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/3218/8840/files/turuxib.pdf
    • https://cdn.shopify.com/s/files/1/0428/4055/5687/files/papujaxajefegebizuvo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3818/7413/files/nozatodijixixipamuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/9011/5748/files/hayward_pool_heater_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9334/4924/files/brevet_maths_pondichery_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/dalaxit.pdf
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/xeligubisolifo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7299/2918/files/durmukhi_nama_samvatsara_panchangam_telugu.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_off0000634d.bin
355bb2118122fd1f0e1c0b778ae2ea71e8d22d882155e86198bf43d8898ab7bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x634D 5232 bytes
font_01_sfnt_off0000750a.bin
f14ee1ce9c92e63a904c0c62c684e99abaefd3428c4252cb1726808f1931e9d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x750A 10336 bytes