Malicious PDF — malware analysis report

Static analysis result for SHA-256 1402d76d4e3df6ba…

MALICIOUS

PDF

35.9 KB Created: 2020-08-01 14:39:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63a31374c687fab8ba83f99bbfab765c SHA-1: 60c33797465b7f1aeccdb6c6d9ca0cfb8b473fb5 SHA-256: 1402d76d4e3df6ba65a58904f15354a286f7fa5bd959a57f612b5c0fe46e395b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO abuse tactic. One of the primary links, 'https://ttraff.com/pify?keyword=rifts+dimension+book+13+pdf', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and URLs, indicating an attempt to disguise malicious activity.

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.com/pify?keyword=rifts+dimension+book+13+pdf
    • http://files.bodiicore.com/uploads/1/3/1/6/131636728/zulumilibere-nibirakulene-fetuzazazu-dewap.pdf
    • http://files.carolmears.com/uploads/1/3/1/1/131164079/1473054.pdf
    • http://files.orchardmemorials.co.uk/uploads/1/3/1/4/131452750/zegaza-gifonolivuloza-rukuxokop.pdf
    • http://files.jewellhealingsource.com/uploads/1/3/2/6/132681464/11010444dd.pdf
    • http://files.startingoverabuse.com/uploads/1/3/1/4/131453401/8813427.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/sigirazu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/28220912349.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/fobamesutupixu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/sosusedagumarubazuvid.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/xefemuxaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/tezakekax.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/niziradogatirutalilevani.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/vizidebetofobo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/89659803755.pdf
    • https://cdn.shopify.com/s/files/1/0434/0488/6166/files/tujagisixuzedijirej.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_off00004c93.bin
130596b405013b63fd3be8010584579d2b6f85a8459e0be6106e49c3ef681fbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C93 5276 bytes
font_01_sfnt_off00005e87.bin
cfd5a44f09ff8a655abde8d2f4e16f9a65813f343998eb15c45320096c8b1565
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E87 10828 bytes