Malicious PDF — malware analysis report

Static analysis result for SHA-256 67503522ecd4ebb4…

MALICIOUS

PDF

49.3 KB Created: 2020-08-24 05:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 821c7bf3e458a4cdf0e981f9cbfcafc2 SHA-1: 22ee0b8ece9778ebedb1d8e4cf103282b9ff2a07 SHA-256: 67503522ecd4ebb4d9206ef1ab04012b98b958d7a7f3c3d0d53b477c5c6afc93
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to movie downloads and a URL that leads to a known malicious redirector. This suggests an attempt to direct users to potentially harmful content or phishing sites.

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/pify?keyword=bronson+movie++480p
    • http://ratef.k12animation.com/uploads/1/3/0/8/130874601/bodeviwe_vomuka.pdf
    • http://razadajo.lifecoach-sacramento.com/uploads/1/3/2/3/132303195/dezoloxuxifipa.pdf
    • http://rasat.refugechurchnola.com/uploads/1/3/1/4/131406149/demoto_nekis_dotizifudo_narogizara.pdf
    • http://files.annayeroshenko.com/uploads/1/3/2/8/132814342/fc6d6.pdf
    • http://wubulojo.brownsugarbabyllc.com/uploads/1/3/1/4/131437044/rizuwoxede.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/adobe_character_animator_size.pdf
    • https://cdn.shopify.com/s/files/1/0434/4384/7328/files/calligraphy_printable_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/objective_c_timer.pdf
    • https://cdn.shopify.com/s/files/1/0434/4548/5725/files/gevetew.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/51631507849.pdf
    • https://cdn.shopify.com/s/files/1/0465/3200/1950/files/juxajagijikurebonox.pdf
    • https://cdn.shopify.com/s/files/1/0436/8017/0137/files/vilumaxarite.pdf
    • https://cdn.shopify.com/s/files/1/0430/1206/3391/files/giwisogijakemo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/56593761248.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d2a.bin
abb512ca18075df02d58ca8c4280f3eac0769a0242504d3c3969c4ca652823db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2A 5256 bytes
font_01_sfnt_off00007f04.bin
be7c11c79b3317874b9e7b7fea33d83183d66450667d27841364e61f29ccabe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F04 10412 bytes
font_02_sfnt_off0000a2e9.bin
bbe35e28b961b0945fd643f2af6592a4ea3ce3d1ac193c1d4ba6f847f464b47b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2E9 16192 bytes

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