Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2818ebeaf3fbed…

MALICIOUS

PDF

41.0 KB Created: 2020-09-11 06:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd337ae7d8c44d1db0d5397d9344bafd SHA-1: 2adf2a93a81dbd085e549762e75b88171e88ef05 SHA-256: 5a2818ebeaf3fbed53dc0d6a2c7f4f60811f339141484da10612daa4cbd3de2e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The presence of a link farm suggests an attempt to distribute malicious content or conduct phishing. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of direct payload execution.

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.link/wix?keyword=deschamps+reportage+tf1
    • https://static.usrfiles.com/ugd/82e28d_fffecb5187f949e582dc8c495c3b6718.pdf
    • https://static.usrfiles.com/ugd/b926a8_28f75db7e1ab4a1ca94e18ec783f2bf2.pdf
    • https://static.usrfiles.com/ugd/576447_7b0e40d878fc43e1aa00ab57237aa36a.pdf
    • https://static.usrfiles.com/ugd/21e6f2_efb0fbede8964742b8b3a80379793e44.pdf
    • https://static.usrfiles.com/ugd/9f06f8_45ab69414f744b519fe7bedf327e6f8d.pdf
    • https://static.usrfiles.com/ugd/98d639_b31a2ed483d34c56a0a280219f479d53.pdf
    • https://static.usrfiles.com/ugd/2ac701_d99ff4eeab264904a89c4cf4bee550df.pdf
    • https://static.usrfiles.com/ugd/e2c223_2d56b0f87f954affa766fd8cc8319dff.pdf
    • https://static.usrfiles.com/ugd/739437_5c9f76e509ed45dc86e4be85851dd81c.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_off000062f8.bin
4684715ad0f2fa5f5ecc8bf78bd713279b729cac465fcdadcaa979da6beff69d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F8 5448 bytes
font_01_sfnt_off00007565.bin
f2cd18192b02ecf9e0f329f67cc778861c554ff04261aa3d3b700f489d37db39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7565 10060 bytes

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