Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0392804a0ded0d1…

MALICIOUS

PDF

36.3 KB Created: 2020-08-06 05:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7926cfe758e22c7b90a956e01c1dfdb SHA-1: 2b834de393a93f88b9b1951c26a4eb89e83161ce SHA-256: d0392804a0ded0d1ff3bd60c5e8769c8c5bd5a9cd19bbf738a410845727c9ddd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a direct link to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to lure the user into clicking the malicious link. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=management+organizational+behaviour+mullins+pdf
    • http://pamex.toddkisicki.com/uploads/1/3/2/3/132303035/301f095c484.pdf
    • http://files.hlfmgoats.com/uploads/1/3/1/3/131383553/jopaxubesoz.pdf
    • http://files.francescaeldridgehealth.com/uploads/1/3/0/7/130776562/fb3a3b7bc25ced6.pdf
    • https://cdn.shopify.com/s/files/1/0435/2537/4103/files/vinatokaxupozavuzerop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98572357872.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/britannia_products.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/55847844707.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/guzekog.pdf
    • https://cdn.shopify.com/s/files/1/0430/8189/1989/files/keruzizinilaporumaxomo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/zumozedoparaxonulev.pdf
    • https://cdn.shopify.com/s/files/1/0432/4442/1282/files/zazaxitazaruxorasexebe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/septic_abortion.pdf
    • https://cdn.shopify.com/s/files/1/0438/3113/2322/files/cpp_office_365.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6974/files/8682814208.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_off00004e8d.bin
c761c8c5a1144ffb22313e02a41f58c43b85f1825d5e346a625164fd034123ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E8D 5708 bytes
font_01_sfnt_off000061e4.bin
50889864bcc9313b51963594232f50b327d36e55cc0e4cb76af5cff67d1a1fab
pdf-font-stream PDF embedded font (sfnt) at offset 0x61E4 10252 bytes