Malicious PDF — malware analysis report

Static analysis result for SHA-256 874e3c16814ee1e4…

MALICIOUS

PDF

46.7 KB Created: 2020-08-31 11:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3eb41b42504e5ab568878baed1c4357 SHA-1: 93c450789ef65e5bc6cac3498acb01c4c0cb3bba SHA-256: 874e3c16814ee1e4ecf180dd8352c0c251bee32b31dd04e3398b3603bd1c329e
162 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=metro+2034+english+pdf', which is flagged as malicious. The presence of a 'download button' heuristic further suggests a lure to trick users into clicking the malicious link.

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=metro+2034+english+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6343/4654/files/reasoning_ability_paper.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/auto_body_repair_technology.pdf
    • https://cdn.shopify.com/s/files/1/0462/7241/3856/files/bedubapizow.pdf
    • https://cdn.shopify.com/s/files/1/0459/5636/6495/files/herramientas_manuales.pdf
    • https://cdn.shopify.com/s/files/1/0437/5671/6183/files/further_pure_maths_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/6952/2599/files/borderline_personality_disorder_journal_articles.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae03b30485084813961b24a2ed935480.pdf
    • https://static.usrfiles.com/ugd/a59130_8c0a63eb9f734c57aee67435d82d31f2.pdf
    • https://static.usrfiles.com/ugd/2b25b5_2a43d802455048d0821959091cc9aed9.pdf
    • https://static.usrfiles.com/ugd/b8c837_20e39a787be1497a9b1ff2e3c267bea5.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b2801f4ef954e06afde1a49b0f6e3d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc8e52f31d8a46a3b47b84bedcd9b529.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_off00005b9a.bin
e2021faec954843f1ba2e1018ae2140311dc5a69cdc0e353d726f425a8abb2a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9A 5624 bytes
font_01_sfnt_off00006ec4.bin
9085bcc073e08764e5f9a9609d764896f39ca7f3955f827151f2a44c051108aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC4 13216 bytes
font_02_sfnt_off0000990a.bin
4935603ab55f76872287563a9769dd1c174124dacc281fee03fb2e864e4c444f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x990A 16144 bytes

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