Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66747d932769e59…

MALICIOUS

PDF

62.8 KB Created: 2020-08-29 17:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea6cecd5c4e2b96980d44da88a55a1e5 SHA-1: 7214e64f03070f681b7b0e69827d66b0d9adfdb7 SHA-256: e66747d932769e5952f23ce9dec95bb9202d3681293096e44c5284264f3d4047
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=jeanette+winterson+written+on+the+bo'. This indicates the document's primary purpose is to redirect users to a malicious site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of the malicious URL is sufficient evidence for this assessment.

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=jeanette+winterson+written+on+the+bo
    • https://cdn.shopify.com/s/files/1/0465/0870/3894/files/sample_business_report_format.pdf
    • https://cdn.shopify.com/s/files/1/0434/6835/7796/files/agricola_rules_revised.pdf
    • https://cdn.shopify.com/s/files/1/0431/0486/2374/files/jidar.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/39668270750.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7023/files/classify_rational_numbers_worksheet.pdf
    • https://static.usrfiles.com/ugd/b8c837_eede3ab716d54fe9b473468c1b025f2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfb5203171da4fb8b8665314279c615c.pdf
    • https://static.usrfiles.com/ugd/6c98bc_4bf81ace6ba7445390198374d84ccb01.pdf
    • https://static.usrfiles.com/ugd/b8c837_3683eb330c6b48d8a4545261a89254fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a844f21c1624ec0968bceebf0a1ccdb.pdf
    • https://static.usrfiles.com/ugd/b8c837_69ea20d14b0140ecba4d52c61cc1b7ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_495b255cf0bb4d7cac6070c91c4eddff.pdf
    • https://static.usrfiles.com/ugd/b8c837_9272e80b060e4b27adc9b0f291a28513.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_off0000bacf.bin
7ba233a582b97b82beefcdbbce520c5eafe61233270ef073fc205a876c1a30dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xBACF 4964 bytes
font_01_sfnt_off0000cbba.bin
c947619af9cc9b24a9e0af578d9077b46591d19694738c42532a5e88b5b9846b
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBA 10088 bytes