Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05e388dd5977268…

MALICIOUS

PDF

42.1 KB Created: 2020-08-29 14:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c20aa8b44fd3dba9180e6a2ea3a5bea SHA-1: cfa5edec7c737ee980a4ccb9d11fd44930d7e67e SHA-256: d05e388dd5977268e1b318382ddf99bdf8a203bb1740055aa9edf3e5b7c00eec
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a streaming service for 'Ned Kelly'. The document body, though heavily corrupted, contains fragments that suggest this lure. The PDF also hosts a large number of external links, many pointing to benign Shopify URLs, likely as part of an SEO spam campaign to improve search engine ranking for the malicious redirector. The ML classifier strongly indicated maliciousness.

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.me/wix?keyword=ned+kelly+streaming+vf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/mefigarerumites.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/89835068688.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taniseraguvifololesugom.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/convert_application_octet_stream_to_online.pdf
    • https://static.usrfiles.com/ugd/238140_374aca46d4b74c62ad3f33fcabbb9f75.pdf
    • https://static.usrfiles.com/ugd/b8c837_49773783d9b1483f950c79338b3366ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6f240838ca84365b428cf9ff385a940.pdf
    • https://static.usrfiles.com/ugd/6924eb_a142a1739c874c3785865436da61fd9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_95e3fd9b63754def9f9f155dcc2c4c7c.pdf
    • https://static.usrfiles.com/ugd/8b2c09_1e68729c5ca24c7ca2db94586d454190.pdf
    • https://static.usrfiles.com/ugd/b5472a_01f714f5b1c14e1bbeef5164203df88f.pdf
    • https://static.usrfiles.com/ugd/b8c837_7db0d350fd5647a1a2727bb7f3977c85.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffe5f4d356c04db99c343782e2aaf3dc.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_off00004fe7.bin
334a9d4499ad981bc8a2ef1a9d19a080068462b6afcbdc975a66194c2d4f7923
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE7 5420 bytes
font_01_sfnt_off0000625b.bin
63d1cbf4ecffd962615da6b304b2ea2826b222650f6c4ab80bbc9cb54ae45103
pdf-font-stream PDF embedded font (sfnt) at offset 0x625B 10580 bytes
font_02_sfnt_off000086ae.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
pdf-font-stream PDF embedded font (sfnt) at offset 0x86AE 16092 bytes