Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d0b3bf509303df…

MALICIOUS

PDF

41.9 KB Created: 2020-09-01 11:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd652b805832cc6be1d1ed82f855a723 SHA-1: cac9129ae4ccbf0a07dcc65c593d7d8edfb1499d SHA-256: 17d0b3bf509303df06e393474020ac352fee6cf84fafd02742412ecc401412de
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/wix?keyword=dead+island++free+pc, which is flagged as a malicious redirector. The heuristic 'SE_SECURITY_BYPASS' indicates the document may also instruct users to disable security features, further increasing the risk.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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=dead+island++free+pc
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/24631743978.pdf
    • https://cdn.shopify.com/s/files/1/0433/9010/7815/files/cubase_8_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0452/9104/5026/files/netnography_doing_ethnographic_research_online.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/ayurveda_books_in_tamil.pdf
    • https://static.usrfiles.com/ugd/07ef24_93481109410c44e49b8ce99ecf2b0fd7.pdf
    • https://static.usrfiles.com/ugd/5e81b9_22e3674e0b204f7f9b8146b9be80530b.pdf
    • https://static.usrfiles.com/ugd/9c0842_5486b6db71f840b0aa6870fd85bf7672.pdf
    • https://static.usrfiles.com/ugd/af0aa9_a9f974fe14b5424e9f9c05cb5deb0bf2.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/kudoma.pdf
    • https://cdn.shopify.com/s/files/1/0435/2478/4283/files/81098237777.pdf
    • https://static.usrfiles.com/ugd/4c76bf_6f69b80e7a41493180921909773c0411.pdf
    • https://static.usrfiles.com/ugd/756799_7416c813b31e474295d2337ab268a6fd.pdf
    • https://static.usrfiles.com/ugd/b8c837_0fd34406ab50430ea2086a9692783284.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_off000065a3.bin
cc48a9e6ddcb012f2d57fc7a1d9a6b5e2d9af8fb244963b5627b26382eb63928
pdf-font-stream PDF embedded font (sfnt) at offset 0x65A3 5148 bytes
font_01_sfnt_off00007740.bin
85d6203877bf2e2562989c9a663621c028dd10131e5167ee1ede6cac982e12c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7740 10480 bytes