Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e018b99276301f4…

MALICIOUS

PDF

39.5 KB Created: 2020-08-31 01:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd34f4a543f83c4dbe6cf8b7352db3f0 SHA-1: ffd8c0bfdd393a0469058a2bea0ea60b64ead9e2 SHA-256: 6e018b99276301f47c05eda1ec99b6b3734b8a67fc2232a0cd5df1b71dfa5e1b
162 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links, including one pointing to a known malicious redirector. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains the primary malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wix?keyword=sixaxis+apk+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/1f2646_b3dec61988434650bd2d64951971049c.pdf
    • https://static.usrfiles.com/ugd/4826f5_222eca9b5cf2425588d729fd08c5e010.pdf
    • https://static.usrfiles.com/ugd/affaa6_3b8b799af2c7400b8d317fd8823c7606.pdf
    • https://static.usrfiles.com/ugd/b8c837_dca248b2fdd34075aa563d43fe792528.pdf
    • https://cdn.shopify.com/s/files/1/0435/1361/0404/files/object_array_java.pdf
    • https://cdn.shopify.com/s/files/1/0441/1988/3928/files/frontier_live_tv_guide.pdf
    • https://static.usrfiles.com/ugd/b8c837_3287f6c608f146e5b9d64f30e8c8d0a0.pdf
    • https://static.usrfiles.com/ugd/83b1b3_4a99d8e2dd8c4e8ba8c466e9b551fa6e.pdf
    • https://cdn.shopify.com/s/files/1/0430/6223/1201/files/chrome_os_for_virtualbox.pdf
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/13949116381.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jotinu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1600/9374/files/juxasajon.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_off00005b78.bin
4ace17b357d46acd2af22565dd02e0a2ccb20e67e4a86983f0502280b980e520
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B78 5184 bytes
font_01_sfnt_off00006d3d.bin
49861ca7a711ec76677d0d10547eab08b6f83502e5728c48be89ae7cdb8ddadc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3D 10832 bytes