Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc5c5bff07462ec…

MALICIOUS

PDF

45.2 KB Created: 2020-08-14 10:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50110652e6f6f431af5ab61f0f224fcf SHA-1: 1f8dbbfab9ca1425a67acec15561dd9429346b1d SHA-256: 6cc5c5bff07462eca1b790aba6546bbee483435addb01298748af932bb1ffea0
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external resources. One of the primary links directs to `https://ttraff.com/wb?keyword=mester%20de%20juglaria%20y%20mester%20de%20clerecia%20pdf`, which is flagged as a malicious redirector. The document's structure and content suggest an attempt to manipulate search engine results or lure users to malicious sites under the guise of academic material. No scripts were extracted, but the presence of numerous links and the malicious redirector indicate a phishing or redirection attack.

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.com/wb?keyword=mester%20de%20juglaria%20y%20mester%20de%20clerecia%20pdf
    • http://susutawa.chicouta.org/uploads/1/3/1/1/131164066/gesigukejabi-jasujawige.pdf
    • http://jurawof.theathinai.com/uploads/1/3/0/7/130775350/632226.pdf
    • http://files.michellekhuu.com/uploads/1/3/0/7/130775734/8909918.pdf
    • http://files.radiant-wellness.com/uploads/1/3/1/4/131453506/4178524.pdf
    • http://lazonefe.milagrodesignsantafe.com/uploads/1/3/1/6/131637419/5497978.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/79292190261.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/15795391127.pdf
    • https://cdn.shopify.com/s/files/1/0439/4388/7016/files/puvufubox.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/57171450708.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0135/files/watch_malayalam_movies_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/1438/1980/files/nazuda.pdf
    • https://cdn.shopify.com/s/files/1/0432/6873/5140/files/meladadexob.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5472/files/nunufo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/pigekuwejaxaner.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_off00006f5d.bin
c273f0b049645f6967d58599cb61a7581241130467d9d28c07d64696d0135a46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5D 5660 bytes
font_01_sfnt_off0000829e.bin
d0ad17d9cc99d08b211f9d097a9ab459cfd3612b8d8be7d05d163c505ba10e8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x829E 10808 bytes

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