Malicious PDF — malware analysis report

Static analysis result for SHA-256 1032be54f0b10646…

MALICIOUS

PDF

59.7 KB Created: 2020-08-30 11:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9d25d7fa0b2ad3ff87d23ccb8b110f3 SHA-1: 5085f686cc066295dc50d74c01e4a3fa9367ba38 SHA-256: 1032be54f0b10646fd1be28a8bee4713b6e7939bcc175a23b787e09df80f3d14
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a product review and the malicious URL, suggesting a lure to drive traffic to potentially harmful sites. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic.

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=vizio+m+series+70+inch+240hz+review
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_ffee06910d8b4c089bd896cc3b6c75a7.pdf
    • https://static.usrfiles.com/ugd/162fe6_3ff634d70bfb4a94b68b1e99181bea09.pdf
    • https://static.usrfiles.com/ugd/e3325f_36119592474049d6aedb0ec568536baa.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_8664e15765354bf6bfdfa0f8a02266fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_c92483f654da4abebf15557d295bfa6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5e1b765ff71455fa2a41edc4610bdfc.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_e88eff06fa524d9ab6abd5fbd8d12ee7.pdf
    • https://static.usrfiles.com/ugd/9e53d4_ff7eb61f610548539bac8cb71a090129.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2d3ad00f82e41b29ca32be804017d62.pdf
    • https://static.usrfiles.com/ugd/5b5da7_ef4d0d93bf7d4f59834f0ca6c69531ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_315b20d8ca77404a846b30d1aad8113f.pdf
    • https://static.usrfiles.com/ugd/dd4472_b49e313bc0f64d83b394fdbaccd75e32.pdf
    • https://static.usrfiles.com/ugd/97634b_34725fe6f88546f78f8dd730f7b9c82f.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a6fb.bin
3c160e4a172669c0101b72368cb4571d74d07961db0340fb8182f0aa42c39281
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6FB 5408 bytes
font_01_sfnt_off0000b95a.bin
21a65914054f915353359d1eefd94e0f12e91b6c3dd4d1cb030079c08f9caf7c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB95A 11476 bytes