Malicious PDF — malware analysis report

Static analysis result for SHA-256 866417024a747a38…

MALICIOUS

PDF

46.4 KB Created: 2020-08-31 16:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13e5d398629a6645700771a1c6132581 SHA-1: 8531db640386909f9097dfe0d4662ecad43579c7 SHA-256: 866417024a747a384d6391e63ba7c0dcc68b4c7fdee534421f2352e40fb4df18
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a likely attempt to direct users to malicious content. The ML classifier also strongly flagged this PDF as malicious. The embedded URL `https://ttraff.cc/wix?keyword=chori+chori+movie++720p` is the primary indicator of malicious intent, likely serving as a lure or part of a phishing campaign.

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/wix?keyword=chori+chori+movie++720p
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_88218eff24bf439d88857ad7bd5bbd51.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5457bbe5509467abd543692feda57f7.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_d08ab2b392044befb873cfcc2c13be5c.pdf
    • https://static.usrfiles.com/ugd/9904c2_9b295f0fe928433fafe16f6c4c895eab.pdf
    • https://static.usrfiles.com/ugd/b8c837_28edbdd2431c4c3da1dd0e0487090a38.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b386d4fea1f4f8880ee482204dfd440.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_7f8cc533d0964c4c874ac56e9506ea0d.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/alimentacion_saludable_minsal.pdf
    • https://cdn.shopify.com/s/files/1/0431/0283/0745/files/58905529143.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/vafukifebepobosadesowul.pdf
    • https://cdn.shopify.com/s/files/1/0438/2674/1405/files/allotropic_forms_of_carbon_definition.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_off00006388.bin
61b75bffe56682fa45050bc966b708bfbb2b647ed83975dec6bbc9c9c4a5d2b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6388 5072 bytes
font_01_sfnt_off000074af.bin
3e1957e391cae0d03b28f38b7bf81059b83f749054467bf1210753b18f3c75fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x74AF 10244 bytes
font_02_sfnt_off00009807.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9807 16164 bytes