Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad09850255c86834…

MALICIOUS

PDF

44.7 KB Created: 2020-08-07 23:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4fdc098b836b1b234cc10e2f9ad8c91 SHA-1: c859cd2af5f7c4f5aa737e2aa18bd6983ab2b251 SHA-256: ad09850255c868346087ce87800899e91c015a37108e457eb8f799cc563743cf
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, specifically `https://ttraff.cc/pify?keyword=traditional+bowyers+bible+pdf+free`. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=traditional+bowyers+bible+pdf+free
    • http://zovop.allezmag.co/uploads/1/3/1/4/131437778/kebirozovi.pdf
    • http://files.tibetanfirepalm.com/uploads/1/3/2/6/132695525/wovizog_xifipon.pdf
    • http://files.highercallingplanning.com/uploads/1/3/1/0/131070841/8558143.pdf
    • https://cdn.shopify.com/s/files/1/0431/7036/5589/files/70325220570.pdf
    • https://cdn.shopify.com/s/files/1/0434/9919/2472/files/accounts_mis_report_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6247/files/37336651257.pdf
    • https://cdn.shopify.com/s/files/1/0438/5007/2224/files/37067943598.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/github_pages_branch.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6848/files/48442561628.pdf
    • https://cdn.shopify.com/s/files/1/0430/4220/9945/files/audit_number_on_texas_dl.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xawifakupubegezixezo.pdf
    • https://cdn.shopify.com/s/files/1/0438/7602/4475/files/38784396566.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9285/files/class_9_history_book_ncert.pdf
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/91880518908.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9973/files/scb_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/35758240896.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_off0000692d.bin
73b8a5a16bf0a9e5724f0c179b8f7a6424f68c30181368e4baf2e33f15d7a741		 pdf-font-stream PDF embedded font (sfnt) at offset 0x692D 5320 bytes
font_01_sfnt_off00007b5e.bin
af37d2b12374b63a1a44b268d546583f434428af678466405ffc9338d0c79d25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5E 13300 bytes

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