Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e48cf779016fe3…

MALICIOUS

PDF

48.6 KB Created: 2020-08-21 12:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ace60c407958a449252329fa48f310a7 SHA-1: cdaf077d39e49c1843b2204062d4c21488c7f9c1 SHA-256: 02e48cf779016fe37e209cf18294eeac1976cf2983000ce31a4dff9e47b606c9
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into visiting a malicious site under the guise of educational material. The ML classifier also strongly indicated maliciousness.

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=comprehensive+sexuality+education+in+ghana+guidelines
    • http://files.margokirtikar.com/uploads/1/3/0/7/130775171/koviwofarolaman.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/babape.pdf
    • https://cdn.shopify.com/s/files/1/0439/4595/1400/files/avian_diseases_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2283550224.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/ralezumewisofibaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/46122493026.pdf
    • https://cdn.shopify.com/s/files/1/0435/7462/4419/files/7224518552.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/rizukuxujelewabonofosajad.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4751/files/40455566368.pdf
    • https://cdn.shopify.com/s/files/1/0434/1766/5701/files/84597520761.pdf
    • https://cdn.shopify.com/s/files/1/0429/2434/3462/files/20544219696.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1041/files/13664614020.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4664/files/techniques_of_data_analysis_in_research.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_off00007ea6.bin
4e31ca7311738da9f5e2bd6f0f13eafea7093ef2f15798d1e43b7e2582aea46f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA6 5624 bytes
font_01_sfnt_off000091a2.bin
518b1187353f92713f7ea1de8ce9541e5aafff333d7ed5a83b4f50d2c76b2884
pdf-font-stream PDF embedded font (sfnt) at offset 0x91A2 10584 bytes