Malicious PDF — malware analysis report

Static analysis result for SHA-256 43211cf529033ce3…

MALICIOUS

PDF

35.3 KB Created: 2020-08-22 11:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21fa067a61845dd4590f14d3a4c05dec SHA-1: c8e2418fa0472e12dd4e5024f873378b913d2383 SHA-256: 43211cf529033ce3750e46c7712358ccad115969364c8a043a794e7418e9f1fe
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=hogwarts+express+ticket+template+editable', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to reference the 'Hogwarts express ticket template editable' lure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate malicious destination. The ML classifier strongly indicates malicious intent.

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.cc/pify?keyword=hogwarts+express+ticket+template+editable
    • http://files.emsequinemassage.co.uk/uploads/1/3/0/7/130776644/vubumigalaf-gegazip.pdf
    • http://vumixevu.officialovercraft.com/uploads/1/3/1/4/131452903/4387008.pdf
    • https://cdn.shopify.com/s/files/1/0428/0641/1431/files/69784791389.pdf
    • https://cdn.shopify.com/s/files/1/0433/9744/7836/files/palimatarasetafibi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kulabegidubonigupux.pdf
    • https://cdn.shopify.com/s/files/1/0434/1825/5516/files/devizopis.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/dojutupibepegot.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/45936746615.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/41811529536.pdf
    • https://cdn.shopify.com/s/files/1/0464/7279/0174/files/pivezenodofig.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/mecanismo_biela_manivela_corredera.pdf
    • https://cdn.shopify.com/s/files/1/0437/6887/3112/files/43062352638.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_off00004ac8.bin
f03a34c5cea1737dfac695938944e6183a19b6264c712edbbd2f22d4b8ceab61
pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC8 5716 bytes
font_01_sfnt_off00005e34.bin
eab244db4072c62dcf5cfb9d5c98bc220aaf94983fdccd3556c2e1789452f587
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E34 10088 bytes