Malicious PDF — malware analysis report

Static analysis result for SHA-256 042344447445b2f3…

MALICIOUS

PDF

40.6 KB Created: 2020-08-04 21:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b829a8b881169aa2b3af614d7fde10f SHA-1: 6fba1ee5d544b5cec1af0a8415653a260e05ab7e SHA-256: 042344447445b2f3cc8288e6f2100ec7a9cee12544fc359da63db46b40e16438
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to suspicious or unknown domains, suggesting a link farm or redirection strategy. The primary malicious link identified is https://ttraff.ru/pify?keyword=centroid+and+moment+of+inertia+nptel+pdf, which is flagged as a known malicious redirector. The document's structure and the sheer volume of links indicate an attempt to drive traffic to potentially harmful websites, likely for malware distribution or phishing.

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=centroid+and+moment+of+inertia+nptel+pdf
    • http://files.sullidrama.com/uploads/1/3/0/7/130739119/810018.pdf
    • http://files.domainedefrance.com/uploads/1/3/1/8/131856162/2893559.pdf
    • http://files.countryneedleworks.net/uploads/1/3/0/7/130775197/votexeberoxakus.pdf
    • http://files.mindfulhearthealth.org/uploads/1/3/1/6/131606617/fumifagupuwujojufubi.pdf
    • http://files.betterbodiesgympattaya.com/uploads/1/3/0/7/130738607/jisuvap_liraxaset_zukonik_wubevatonaxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/countdown_timer_html_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/gimekodugujanurawi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/66553732032.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/69023206080.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/sifap.pdf
    • https://cdn.shopify.com/s/files/1/0437/2011/4331/files/84046870671.pdf
    • https://cdn.shopify.com/s/files/1/0440/6558/7352/files/young_jeezy_the_recession_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/31546680698.pdf
    • https://cdn.shopify.com/s/files/1/0433/6618/7176/files/harley_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2505/files/pixuwurevatalage.pdf
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/39347924957.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/ziwituditifavu.pdf
    • https://cdn.shopify.com/s/files/1/0440/7502/4549/files/lutozasuwadixet.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/wilefewazorazigomunoji.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_off0000629b.bin
969071238f92c05673994f620635e0c91e4969016f634971be8dd27ea0681f11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629B 4916 bytes
font_01_sfnt_off00007339.bin
21fc5345c439b406e80a063671826fe2881cb931ab57b995122ef1362bd56cd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7339 9816 bytes

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