Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f96da136eb60b9f…

MALICIOUS

PDF

34.4 KB Created: 2020-09-01 01:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ff49ea7752a9079cfbb39b718ff3d15 SHA-1: be1f4364075b96d2dc72671b255deea55db9d40b SHA-256: 6f96da136eb60b9f9f1432a03ae9ca93b7d94df387757dbec8da738c7cda3d1b
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'refractive index of glass block experiment pdf' and includes the malicious URL. The presence of numerous other benign-looking PDF links suggests a link farm or SEO poisoning tactic to increase visibility.

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=refractive+index+of+glass+block+experiment+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_136a7fb3610b45b89b3d2de77bad39f3.pdf
    • https://static.usrfiles.com/ugd/628a76_8543efe25cf24d06b9c039e6940ca0a3.pdf
    • https://static.usrfiles.com/ugd/0d9a50_1f171e2231cc4bf98cf5cb44c192de61.pdf
    • https://static.usrfiles.com/ugd/238140_3eff53022de84c68bc39ec6708440b0e.pdf
    • https://static.usrfiles.com/ugd/33a16d_a53bcb93217441e38053e4055a41227e.pdf
    • https://static.usrfiles.com/ugd/b6edda_c05fc0aa4f8541b385bae194bfbf8c7c.pdf
    • https://static.usrfiles.com/ugd/33ab24_338ac30ad2d14fe4836e7ee5778ea43a.pdf
    • https://static.usrfiles.com/ugd/5e8de6_abe61fb969734b2bad7b2fa9eea7fd78.pdf
    • https://static.usrfiles.com/ugd/b8c837_b665a348b6144919aacb5c9f5cfc3fc8.pdf
    • https://static.usrfiles.com/ugd/a91264_71189715630945a092577774359895b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_47248dd6f0a14672b265e6081293c3cb.pdf
    • https://static.usrfiles.com/ugd/33a2e4_145c1cd475bb44fc970f31ae20ecdfd3.pdf
    • https://static.usrfiles.com/ugd/0511f5_4430a05eefa9437190d3094800b2cfe1.pdf
    • https://static.usrfiles.com/ugd/a4d998_b071db01c26f45ba9783ed13e4e6490b.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/571475918.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/ap_sachivalayam_digital_assistant_syllabus.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_off00004799.bin
cdb02c48bbf363f0c29785f2870360a3009df4c68a1594f96042a3991de7427e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4799 5816 bytes
font_01_sfnt_off00005b62.bin
5178f778902241ee82eaa8eba507eceea052c675e2964b30acc6ce4344a9bef7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B62 9700 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.