Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e227cbd25e3cfa9…

MALICIOUS

PDF

44.6 KB Created: 2020-08-30 02:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35d2454444269c970d0a43c7412f5965 SHA-1: 9c02b257e29a395585701b4869c58c027053b19b SHA-256: 0e227cbd25e3cfa9d4187e157ddaba03fa9a12f75312fb08cad011904575e46f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link disguised as a "draw something challenge" that leads to a farm of other PDF files. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL suggests an attempt to lead the user to a malicious site or download further content. The document body is heavily obfuscated and contains embedded URLs.

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=draw+something+challenge
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5699/5233/files/mathematical_foundation_for_ai_and_machine_learning.pdf
    • https://cdn.shopify.com/s/files/1/0439/6358/0574/files/5439525057.pdf
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/xalazijaneza.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/dafomamapokaxamixoni.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/smackdown_vs_raw_2007_roster.pdf
    • https://cdn.shopify.com/s/files/1/0439/4886/7742/files/physics_textbook_grade_12.pdf
    • https://static.usrfiles.com/ugd/510a18_9746523dddd84bad9119e0e273a58c9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_04d1f3a3380e4712b1ef075d87b1ab9a.pdf
    • https://static.usrfiles.com/ugd/ab0441_0e302b03a3cd43169cc033fc1655c20d.pdf
    • https://static.usrfiles.com/ugd/b8c837_83e406be316f41fd8e5e6d01ba20bef6.pdf
    • https://static.usrfiles.com/ugd/b8c837_425f876c42304fc58deadb6123b02bf4.pdf
    • https://static.usrfiles.com/ugd/1b8612_475005c69df949d1bcc1dc2117660620.pdf
    • https://static.usrfiles.com/ugd/79cb75_7b19d49803fd4023a1de6ba605c574f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1b07e5cc80f421399e748d3e082ab2a.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_off0000563c.bin
a89ef4a5c7755176551f6c4e52895b8a89e05fd1e1bea063b3abce7ded4788d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x563C 5304 bytes
font_01_sfnt_off00006837.bin
6074dab4cc9ad493b12d0dfb83df9a34d00e1b1907188e2a2f482f94893edec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6837 11896 bytes
font_02_sfnt_off00008ea4.bin
3d70b5f83ac5de55155f2e91edd8675731123a66480fc149db4bbc40a8ed4626		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA4 16192 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.