Malicious PDF — malware analysis report

Static analysis result for SHA-256 854377590606f502…

MALICIOUS

PDF

48.2 KB Created: 2020-09-01 00:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5035c1455f3eb46f4e9b38f20b1fd6d SHA-1: 3987f8b29fe4053dfda3a06e2aca9d7e4e0f38b6 SHA-256: 854377590606f5022780abc52e7ce760ee508ed1bb3deb159e1ea085c7cf1aff
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, another critical heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute malicious links. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware distribution site.

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.ru/wix?keyword=h%25C3%25A1t+guide+l%25C3%25A0+g%25C3%25AC
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/863427749.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/tuvamulevifafulewapine.pdf
    • https://cdn.shopify.com/s/files/1/0460/2531/0367/files/film_the_hunting_ground_2015_sub_indo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/fallout_3_pc_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/2594/7029/files/kuzunogilatides.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/jeduno.pdf
    • https://static.usrfiles.com/ugd/93971e_05c120e908d14b27bf94827aff9e5ca9.pdf
    • https://static.usrfiles.com/ugd/6116da_1c02869c64e14a3a82082d7ef719a9f9.pdf
    • https://static.usrfiles.com/ugd/ab059d_952cdb42c1214de691a683a00579097b.pdf
    • https://static.usrfiles.com/ugd/6924eb_8d5b8eef2a394972b05e1a5ae0e3a83e.pdf
    • https://static.usrfiles.com/ugd/b8c837_32e17859efe84569b320a1a9966ec6cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_4de4d67c5a644ab482c24df1dd9a1e9e.pdf
    • https://static.usrfiles.com/ugd/40512e_b90099489ee3485484ddbc5fcef71029.pdf
    • https://static.usrfiles.com/ugd/fd7405_8a22c839a2064d42947b1d2782f59fe1.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/
    • https://static.usrfiles.com/ugd/ab059d_952cd

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000692c.bin
5c8a1a52274f4daaeb24663502c25b75564aa3a228d6295fa0ed41d9fca660c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x692C 4992 bytes
font_01_sfnt_off00007994.bin
263959e0ba469ad56e7317c20cebe460d7510253d1c96c438135775824a6e9c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7994 10264 bytes
font_02_sfnt_off00009ca5.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA5 16204 bytes

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