Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d943d4f9385157…

MALICIOUS

PDF

37.0 KB Created: 2020-08-14 18:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 391dc7ddad37330a704f98fe77de8b62 SHA-1: ccfde9b5d228dc84c75f051788d206ecf1c4e8c7 SHA-256: 06d943d4f93851573a3dfaa0de5a69c72047a3a1bcd12c37833042de6befdf64
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to movie downloads and the malicious URL, suggesting a lure to trick users into visiting potentially harmful sites. 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.cc/pify?keyword=boss+telugu+movie+hd+video+songs
    • http://fixej.flooritblog.com/uploads/1/3/0/9/130969368/5ad8525554.pdf
    • http://files.gulnurozdaglar.com/uploads/1/3/2/3/132302913/38e83.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/galetukunin.pdf
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/wizine.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3979/files/jugadisadijitozuwalem.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/spider_man_comic_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/exercices_les_accents_ce2.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/ketivirezudav.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/woweruw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99237037604.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/97280873948.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_off00005355.bin
474a9ab8a78a3be0f2ac8c143c32ac98a3e08c428c311e81660aa8036cd25373		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5355 5040 bytes
font_01_sfnt_off00006464.bin
3c157b8d1c7d71e067d9d6e707410d8eff0b8c4bc298534a084e6be001a9429e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6464 10316 bytes

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