Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0c2f0b92417624…

MALICIOUS

PDF

41.5 KB Created: 2020-08-19 12:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 268fbff5a0396950485b1fc428c3e864 SHA-1: 86fd2c9033e6901ca0a3538c4078c139c3bd1347 SHA-256: dd0c2f0b924176246bf5ed4b85768494f5fb37d18646fed603c3c81f4a850c88
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily corrupted, contains text referencing "Dubai expo 2020 brand guidelines" and the tool used to generate the PDF, suggesting a lure to disguise the malicious intent. The presence of a large number of external PDF links further indicates a link farm or redirection strategy.

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=dubai+expo+2020+brand+guidelines
    • http://files.sola-boutique.com/uploads/1/3/0/9/130969305/1398743.pdf
    • http://memufaga.gvequineassistedlearningcenter.org/uploads/1/3/0/7/130776167/32e19f5.pdf
    • http://files.horleycricketclub.co.uk/uploads/1/3/1/8/131859042/2310b.pdf
    • https://cdn.shopify.com/s/files/1/0439/1596/8680/files/centralized_vs_distributed_database.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/regodevejuzip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/wubajoven.pdf
    • https://cdn.shopify.com/s/files/1/0439/3274/5896/files/animal_crossing_android_theme.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/fuzavuxofiron.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3986/files/88448236483.pdf
    • https://cdn.shopify.com/s/files/1/0434/7507/5225/files/gagupesipuzakevedagufog.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/foxasatajiru.pdf
    • https://cdn.shopify.com/s/files/1/0433/3296/0409/files/12281441023.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/menebutavenepokenon.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/33773527967.pdf
    • https://cdn.shopify.com/s/files/1/0433/5455/4533/files/asme_y14_5m_2020_download.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_off000062fc.bin
691b51a80915cf7ff4911777b07d339d5add39702e4c13a397db5ff73341b89e
pdf-font-stream PDF embedded font (sfnt) at offset 0x62FC 5608 bytes
font_01_sfnt_off00007614.bin
ec3926b107c01de66234c0d8a12f32d1f5c85f99b0835b91e44e9ee36567e39f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7614 10280 bytes