Malicious PDF — malware analysis report

Static analysis result for SHA-256 055d408d715e3db7…

MALICIOUS

PDF

59.5 KB Created: 2020-08-30 01:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0837fd5157f574f827f14c5407e51413 SHA-1: f5a977c310f27529e257610dc0282ef537731387 SHA-256: 055d408d715e3db794018a058e4500ae81f5d337aab0dad0bd3f1a1e0a260b15
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one leading to a known malicious redirector. The document body, though heavily obfuscated, contains text referencing a "swgoh gear farming guide" and the malicious URL, suggesting a phishing or scam attempt. The ML classifier strongly indicates maliciousness.

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=swgoh+gear+farming+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_370d3142b2dd427b91091a4ecdfb54ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_1419d63d92f34f3ca6cab4cd2a702b00.pdf
    • https://static.usrfiles.com/ugd/ab059d_23ce5dd888ee433897b5f4a5ea479e37.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e533bc8250b4b29a78d142719f5ac2c.pdf
    • https://static.usrfiles.com/ugd/824332_f2f9906393214dcea94f1eed27cc0100.pdf
    • https://static.usrfiles.com/ugd/a18aa6_2740213a3307413a9c3f24989a557602.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_988c93e77a7a40ef97d1741740b23051.pdf
    • https://static.usrfiles.com/ugd/362633_7943411bd42747a79ca6377535f9d931.pdf
    • https://static.usrfiles.com/ugd/b8c837_625ec62b2ece41dda5da1f035a410d06.pdf
    • https://static.usrfiles.com/ugd/09273f_2884a270aa7d4d6aaa0c9b141700943a.pdf
    • https://static.usrfiles.com/ugd/289c5e_fb0253fd32a547cf99dfe6c07da90fcf.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_0471f702132d4c87aad83371ffabe7e4.pdf
    • https://static.usrfiles.com/ugd/81d6a4_84cae2afe3d74f9e8f32c823286ef40d.pdf
    • https://static.usrfiles.com/ugd/b8c837_25f619fe66cf499da623bac0f75446b7.pdf
    • https://static.usrfiles.com/ugd/9757e7_47e8e7bb39474c7b9c7c6bd4fb94a65c.pdf
    • https://static.usrfiles.com/ugd/3bca44_403e7f5b530749d4bfb5f2cf58bb13b5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d80.bin
35de3609a2b980ff38c0da7f282b8e984936814ba981f590c2e8d7e8f656b03a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D80 5108 bytes
font_01_sfnt_off0000aebd.bin
702a3aa039a95ec2658554eca128858d9c98d2af8aeb9c199341e2eac7b80fd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEBD 10472 bytes
font_02_sfnt_off0000d289.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD289 4324 bytes

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