Malicious PDF — malware analysis report

Static analysis result for SHA-256 819d342239fa973d…

MALICIOUS

PDF

41.0 KB Created: 2020-09-01 09:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b15e47df3e134e0c3a058bfe6ae04950 SHA-1: cc4acf01197e77cf13b4fa115f8f877543fc3327 SHA-256: 819d342239fa973d0c58b702695edd7e542540dbbba64ec8e1393dd6a88c27cc
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is a common tactic for distributing malware or phishing pages. The document body text mentions 'Battlefield 2142 full game', suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated 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.ru/wix?keyword=battlefield+2142++full+game
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2677/5196/files/nogumigapofixavemotu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4747/7667/files/tesis_de_administracion_de_empresas_chile.pdf
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/ramepogatosemikinotu.pdf
    • https://static.usrfiles.com/ugd/0adedf_25705821f6b84e269b434041e2715b60.pdf
    • https://static.usrfiles.com/ugd/0f1814_e028a1fc75dc4680b2371d0f45f3eece.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb642f2e8f87472d92571b067a601cef.pdf
    • https://static.usrfiles.com/ugd/b8c837_62e5a1dca7b24b449a98ad30dade3d75.pdf
    • https://static.usrfiles.com/ugd/0b46e6_dfc8c0ca198e4f10a15f375ce2793df7.pdf
    • https://static.usrfiles.com/ugd/6f9b04_685b408d04f44effa1d8247d1b55b649.pdf
    • https://static.usrfiles.com/ugd/b8c837_07d40035df2a43baafe2e9f9bf9476f1.pdf
    • https://static.usrfiles.com/ugd/5b604d_97830a8e94454434ac5fef2f5c8f737c.pdf
    • https://static.usrfiles.com/ugd/a2d007_9f43888a88df4b2b898e41887637e875.pdf
    • https://static.usrfiles.com/ugd/f63f29_af590da293b04938ae058faced9584f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_04441d11a284475b909021614dadf60f.pdf
    • https://static.usrfiles.com/ugd/d54300_6583fb046fa245b48ad5dfe7a8ab3cf4.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_off00006250.bin
e4ff61d2cc52a6fa38096976ab0d42d8c8ec0ed8797e9970282a74318302b534
pdf-font-stream PDF embedded font (sfnt) at offset 0x6250 5272 bytes
font_01_sfnt_off00007443.bin
6b8a6645ce1e38e2a7c89d03ca2bbb0e864b29df191ac32a509d3b39c550b543
pdf-font-stream PDF embedded font (sfnt) at offset 0x7443 10304 bytes