Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c7cd28c6658bf7…

MALICIOUS

PDF

56.1 KB Created: 2020-09-01 06:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e36bc1bff537c996b9a473e9f463cf80 SHA-1: b7d432f80986ce1778761d08df591ae4368add52 SHA-256: 54c7cd28c6658bf771d7b27db2325f2a2a8451da3d874a5936707f4e0e6992c6
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same URL and text related to 'javascript auto fill form and submit', suggesting a lure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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.com/wix?keyword=javascript+auto+fill+form+and+submit
    • https://static.usrfiles.com/ugd/61f964_43f69b57c5ae485a8bcd6a810ebb9959.pdf
    • https://static.usrfiles.com/ugd/4dd980_2aba53464bd34582b823618e6ae488f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_f45e0c67bf6d4144944e76151606cdb0.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe7e0f9620d4445298fa1a0d6aa800c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_718fe999dfbf4161b05b24b2e5b4d640.pdf
    • https://static.usrfiles.com/ugd/b8c837_2af84211bd3b42d4a2fc601104296d2d.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_c92c5e14f04c496bbb69b322cbb20efe.pdf
    • https://static.usrfiles.com/ugd/b8c837_14f4ee95e29d48a189c700ca8dbd2401.pdf
    • https://cdn.shopify.com/s/files/1/0433/6192/7318/files/conservation_of_matter_and_stoichiometry_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6849/files/digutupuden.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/88164028722.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdf
    • https://cdn.shopify.com/s/files/1/0438/9535/7595/files/sika_waterproofing_membrane.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5195/files/jeep_cherokee_service_manual.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000907e.bin
287ae48b070412481c420283bc24d6295afb3d2d383a4ca16a228f8babf2b44a
pdf-font-stream PDF embedded font (sfnt) at offset 0x907E 5488 bytes
font_01_sfnt_off0000a31c.bin
9a6367475fef7d654d827beae224f200a806c03fdb1d117a8693b9fb60f339c1
pdf-font-stream PDF embedded font (sfnt) at offset 0xA31C 15120 bytes