Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded541a28ac0567a…

MALICIOUS

PDF

42.1 KB Created: 2020-08-30 23:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c87e7069df49712a4755fca0c2b66129 SHA-1: 216873df24753a37946158f4d9d11c55d2778bb5 SHA-256: ded541a28ac0567aa5687de0276ba705def4cf21267640c2b8e748ebc62a8302
152 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.cc, which is likely used to obscure the final destination of the malicious payload. The document body, though partially corrupted, contains the URL and a list of other URLs, suggesting a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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.cc/wix?keyword=asadores+de+carne+con+ladrillo
    • https://static.usrfiles.com/ugd/b8c837_455f551428b740809a72f88b29ea7ddc.pdf
    • https://static.usrfiles.com/ugd/2f8cea_3287b34cffe840e1b8c4bc598b634388.pdf
    • https://static.usrfiles.com/ugd/77d535_16387a36a8d84f689c0811e9645b606e.pdf
    • https://static.usrfiles.com/ugd/97368a_8765bdac77a64c95a7f650e7b0925075.pdf
    • https://static.usrfiles.com/ugd/4cf28d_a33fdb6a64ab4c969a0bc94dad2cc5b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_69864e2194be4bcab8c9cf96bf64d9ec.pdf
    • https://static.usrfiles.com/ugd/cb5dea_c6e70ea8975b499fb2bd609f5fba489e.pdf
    • https://static.usrfiles.com/ugd/739437_ab96fc524c284516badff218d2cbced2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/endoplasmic_reticulum_structure_and_function.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/understanding_binary_code.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9273/files/aumentativos_e_diminutivos.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/miduzigevepa.pdf
    • https://static.usrfiles.com/ugd/b8c837_10c165ccca2648dea3ce9a573b0be4fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2b0b735e20c4f308f2f9922363ccce6.pdf
    • https://static.usrfiles.com/ugd/ce14f3_bae12429ed1b4da0a32f5cfc5aba0544.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_off00006564.bin
f7a8b956764e76a45f60d865d2f1130d90dfdc1643a6339a8c1a87e63e9422bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6564 4924 bytes
font_01_sfnt_off00007628.bin
c0cbf0a261ee9e3e65aaf4e93bf99ef72197c98ff4fca81d0ddbeca012ff9238
pdf-font-stream PDF embedded font (sfnt) at offset 0x7628 11184 bytes