Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dfc7bdd14a66663…

MALICIOUS

PDF

39.9 KB Created: 2020-08-31 04:18:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9769504792949e8cd08c4314a54b0531 SHA-1: 3d2b1d98faf4acb6196b19b0fea997753ec21419 SHA-256: 8dfc7bdd14a6666396479a6ef2a3489c436eebfb97440d2ddbe7205a0a783c5b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=barron%2527s+ap+statistics+flashcards+pdf'. This URL is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, contains references to study materials, suggesting a lure. The presence of numerous other links, many benign, is characteristic of SEO link farm techniques used to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=barron%2527s+ap+statistics+flashcards+pdf
    • https://cdn.shopify.com/s/files/1/0432/9547/3822/files/xilifopi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2532/5465/files/xejozazatutupanowumuv.pdf
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/english_guide_for_class_10_cbse_ncert.pdf
    • https://cdn.shopify.com/s/files/1/0429/7801/7443/files/community_capacity_building.pdf
    • https://cdn.shopify.com/s/files/1/0434/1976/2855/files/sixth_grade_worksheets.pdf
    • https://static.usrfiles.com/ugd/963627_06415667468741e98e0cfa7b203c774c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b163dd7a12994e479ffc31d4ffef78a0.pdf
    • https://static.usrfiles.com/ugd/77eba6_5efe02bf55e6447f82d36f28d4203cb7.pdf
    • https://static.usrfiles.com/ugd/b8c837_c97c209e9fcb4f68998127364d7fa279.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_97e1f5fc205d43fbabbd4d34a810769f.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_920a0e7349a841bcadb8122ca6520d5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef403b0c606d477e9fae24e17ab10a88.pdf
    • https://cdn.shopify.com/s/files/1/0430/7497/7945/files/36519012480.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9562/files/99828208785.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2641/files/sample_abstract_for_laboratory_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/3064/1826/files/tusebowonejojowedepati.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_off00005e87.bin
f654077d1e72a9ffaebd459a8fde4fceec128cbd6ec97231b660a99d9013b90b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E87 5328 bytes
font_01_sfnt_off0000709a.bin
5d9aee9c889db6c7ff54abbbfccb2d62a40b37298da14a6db024f650da8a8bbf
pdf-font-stream PDF embedded font (sfnt) at offset 0x709A 9920 bytes