Malicious PDF — malware analysis report

Static analysis result for SHA-256 1119d65fcc6388b2…

MALICIOUS

PDF

35.3 KB Created: 2020-08-31 08:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95cd942b50b9d6e6e18d7899de134dd3 SHA-1: 7e18c389c91b927c27d6877ebe40c2dbeae02a23 SHA-256: 1119d65fcc6388b25b4957fec9f818294e512d2470f9bd38b2cdab4088083880
154 Risk Score

Malware Insights

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

The PDF contains embedded links that are presented as a free download for an astrology book. One of these links, 'https://ttraff.ru/wix?keyword=a+manual+of+hindu+astrology+bv+raman+free+download', is identified as a malicious redirector. The document also contains a large number of other links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

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=a+manual+of+hindu+astrology+bv+raman+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/anti_education_nietzsche.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/biwasupo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3267/files/39523480309.pdf
    • https://static.usrfiles.com/ugd/b8c837_55e7767d0cdd483a97363b0b4daa3e13.pdf
    • https://static.usrfiles.com/ugd/b8c837_caf4ffd2e59b427d9999158a8fd5dd3c.pdf
    • https://static.usrfiles.com/ugd/3f4b99_0dabf9fc14714423a34e56df1d540073.pdf
    • https://static.usrfiles.com/ugd/e1d12c_5d323c2e53a845698aa18c7bf7c633b4.pdf
    • https://static.usrfiles.com/ugd/625844_ce40b19d872640bdbaff36f121e0d944.pdf
    • https://static.usrfiles.com/ugd/89363e_ae3cc5472c4b4c0e9b704b859a94b768.pdf
    • https://static.usrfiles.com/ugd/b8c837_3003a8fbfa364b62989e451aa61fb442.pdf
    • https://cdn.shopify.com/s/files/1/0461/6595/0627/files/govusavizuwu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5322/6913/files/38039198995.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/50753453659.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37357510366.pdf
    • https://cdn.shopify.com/s/files/1/0429/6078/1475/files/rofugiwipawurejadejo.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_off00004906.bin
8815e855a6c4128cb5fa9e23d86577ef3dc1b88bf1466510d97928ad8d1a2888
pdf-font-stream PDF embedded font (sfnt) at offset 0x4906 5704 bytes
font_01_sfnt_off00005c5a.bin
e0d1d7e0b6767e40372c7f31dda5f421aabdc2af791a05e749a05acd9ff0b6eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5A 10488 bytes