Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbde236241f7135a…

MALICIOUS

PDF

42.2 KB Created: 2020-08-19 20:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f971c9357bc3fb07ab2bb6a2f9ea8015 SHA-1: a6e0dad9fa012c14bffbf0f2f8cb735f3fafdb90 SHA-256: bbde236241f7135ad7d5bfd5ecbb7cf39c99f2a8a9699a87b762e0b15e7d96d0
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to a 'Shepparton police report', suggesting a social engineering lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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=shepparton+police+report
    • http://mawujis.simplysailing.ca/uploads/1/3/0/8/130814328/3112826.pdf
    • http://bawivoj.chrysalistrio.com/uploads/1/3/2/6/132695203/b55c41cfae3a5ca.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/vmware_workstation_ly._ir.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/sherlock_holmes_rotten_tomatoes.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7407/files/aviagen_turkey_breeder_management_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/rowefunavonukokopivuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/7668/0870/files/43090641573.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3934/files/65458773753.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0167/files/mcafee_endpoint_security_10._2_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/fuvupefasipedofazaxox.pdf
    • https://cdn.shopify.com/s/files/1/0440/7921/8840/files/kipinoge.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3571/files/kadomigodixuvojok.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4682/files/34827005102.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bef.bin
82eca79c0bc847e2cfe7e24b9e484e7d890f379f68155688e81c6d62d7b13615
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEF 4736 bytes
font_01_sfnt_off00006be7.bin
4177715dab8b5b05e2d84541b447e933f9d2df6be4c0e21f09d3759dd1d77dcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE7 9972 bytes
font_02_sfnt_off00008e04.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E04 4324 bytes