Malicious PDF — malware analysis report

Static analysis result for SHA-256 6023c1d2f3a218a2…

MALICIOUS

PDF

41.5 KB Created: 2020-08-07 07:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c7af9ecadff58f53c1b56d1bb83178d SHA-1: 872edc69b111dd5011958cc1931fba8197193916 SHA-256: 6023c1d2f3a218a2263a1ae48ee7d7d1c6a2a458a3b8b1085ed9f2a65b627267
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body itself is heavily obfuscated but contains a reference to the malicious URL. This suggests the document is designed to lead users to malicious websites, likely for phishing or malware distribution.

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=bayesian+data+analysis+3+pdf
    • http://files.chapmanstvservices.com/uploads/1/3/1/6/131606252/7698870.pdf
    • http://bafaxip.nehassaiu.com/uploads/1/3/0/7/130775971/jefal.pdf
    • http://koxivuri.majesty-on-cloud9.com/uploads/1/3/1/6/131636612/3422681.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3731/0626/files/duty_of_care_in_tort_law.pdf
    • https://cdn.shopify.com/s/files/1/0438/0088/7457/files/37773334227.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/zikewadozipuniv.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/about_chandrayaan_2_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0438/9509/5464/files/81779807172.pdf
    • https://cdn.shopify.com/s/files/1/0438/3775/1453/files/uninstall_xbox_game_bar_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9927/files/21574618848.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/dogiwabetejuli.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6939/files/rabijugejinajobobo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8178/files/11951123537.pdf
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/16565329938.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_off0000649a.bin
d635a32e45c573230f4e698ad4d7eb3604d6134cfcc585416989d5634cdc2d62
pdf-font-stream PDF embedded font (sfnt) at offset 0x649A 5256 bytes
font_01_sfnt_off0000769f.bin
8d0007105b1e914c3804cb13354e5b5fae39f90e158632340955735ac41d6ac6
pdf-font-stream PDF embedded font (sfnt) at offset 0x769F 10264 bytes