Malicious PDF — malware analysis report

Static analysis result for SHA-256 5562159ac5c25d3d…

MALICIOUS

PDF

38.8 KB Created: 2020-07-30 14:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14b31095863b6bffb0b2fe09990c7d39 SHA-1: d6e59237b32d02916d39ab44d00a22fd187b5bd9 SHA-256: 5562159ac5c25d3d2eb2f0f54c2814130610e066a1438c847c8e50c02e4d0df9
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure for a 'Tony Robbins unlimited power pdf free download'. The ML classifier strongly flagged this PDF as malicious. The primary IOC is the redirector URL used in the lure.

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=tony+robbins+unlimited+power+pdf+free+download
    • http://files.cannonriverbowl.com/uploads/1/3/0/7/130775197/davijobevexilar.pdf
    • http://files.dillonvado.com/uploads/1/3/2/7/132710624/7661258.pdf
    • http://files.mydadnmom.com/uploads/1/3/1/6/131606011/topatojule-sutuniti-wodipatakij-gojuriretatum.pdf
    • http://files.dillonvado.com/u
    • https://cdn.shopify.com/s/files/1/0437/6464/6042/files/45165947398.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/86060847569.pdf
    • https://cdn.shopify.com/s/files/1/0438/5888/6806/files/47842335019.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0431/7085/7124/files/24049552428.pdf
    • https://cdn.shopify.com/s/files/1/0429/2503/1587/files/wetoxevadop.pdf
    • https://cdn.shopify.com/s/files/1/0430/3595/1257/files/pudonebiseviwegi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/kurini.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6150/files/732001946.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/8329843179.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/fipabida.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_off00005ac3.bin
43b550503ef95296a7755ee5219ee7d5c136caeaa7a55c1a9a4530f90f505c5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC3 5352 bytes
font_01_sfnt_off00006ce7.bin
d3a2529fafd37f4b2890671d4edd793231d13e66dea443013c116e67976dd250
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE7 9664 bytes