Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ee16890a3abdae…

MALICIOUS

PDF

92.4 KB Created: 2020-08-30 21:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de76d8670d86d9cd39976f92daea4b2a SHA-1: 406aada00d29ac7bc2d3f3099ed3c9625cd3f0cc SHA-256: 61ee16890a3abdaedb60408317a6dd0358b73c9727ac804ed0d7e23d24613f24
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.me/wix?keyword=ranking+chan+list'. The document body, though heavily obfuscated, contains this URL, suggesting a lure to external content. The presence of numerous external PDF links further supports a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious.

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.me/wix?keyword=ranking+chan+list
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_604205606b5744b7bbbff45f4fcc0137.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba1c95c30cf7409fb381c6f1eafe6daf.pdf
    • https://static.usrfiles.com/ugd/b8c837_40427c1de91b472eb12c545b3c415cf4.pdf
    • https://static.usrfiles.com/ugd/b8c837_4dae6cf70624488d80d3fba796d71520.pdf
    • https://static.usrfiles.com/ugd/0a593f_69a709197c604ede9fc0d796d74fc6d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ad51b6408ef4ed9af97f2a90451d3d1.pdf
    • https://static.usrfiles.com/ugd/b98abb_ac552a83a8e8417a864172e79caf07d0.pdf
    • https://static.usrfiles.com/ugd/79e0dc_62b012aa2d684dacbc1a6858c59e14b4.pdf
    • https://static.usrfiles.com/ugd/73cb9e_f074664411a64fe19b41313e68f8b9b9.pdf
    • https://cdn.shopify.com/s/files/1/0434/2009/0535/files/bovine_tuberculosis_review.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/28070949734.pdf
    • https://cdn.shopify.com/s/files/1/0432/6575/3241/files/papifafifafamoxubov.pdf
    • https://cdn.shopify.com/s/files/1/0465/1555/2406/files/all_bangla_cartoon_3gp.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/79579507901.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad88.bin
70bbe1652b4e1152d66a162f463f34503bc824395ccc42f95d8216c2db8fe40b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD88 43004 bytes
font_01_sfnt_off00012007.bin
8946e7cbaed70b6e2da42619519bcbe81a12686de007126f17d0b8fde79fa40c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12007 5036 bytes
font_02_sfnt_off0001312f.bin
b103a39fd6c07e2091bcb857e3dac571edf766d51f23f32a0b18a5742f7a0a11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1312F 16868 bytes

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