Malicious PDF — malware analysis report

Static analysis result for SHA-256 662841d53883ed6e…

MALICIOUS

PDF

45.5 KB Created: 2020-08-29 19:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f65fd3b9548c15f8618e275c516537ac SHA-1: 9288d0e46bc6f63688466188c83ab88f0b06fe56 SHA-256: 662841d53883ed6e541b07920ab29c8eabb369758a6b88e8c7475c19e5b81a06
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the suspicious URL and appears to be a lure. The presence of many external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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/wix?keyword=uke+tabs+steven+universe
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_626a7fe04a4f4fcaa4992c9413f713f0.pdf
    • https://static.usrfiles.com/ugd/e32576_f706680d522348d5b5340dd693da40df.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fd71d79b93a453780e69ced8386f8ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_37196bf6334d4812a167b5876e12accf.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/zodijutefokatexowiwilotav.pdf
    • https://cdn.shopify.com/s/files/1/0437/6831/6055/files/88699732866.pdf
    • https://static.usrfiles.com/ugd/b8c837_7bcc7ed12d6f4e20a27e744070c3c711.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5b6b2e2ebab4cee956829f534e28626.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f519e095f76478abb2581925e1b4bc7.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad319baeaa3f4a14b46fe1e02621a7ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7d1ee1b78a9442ca693c84e1bd26f27.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068ad.bin
677705220c0edac70a6038adc6e96e7c0306b17b4e07e96859fdef92869dd8ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x68AD 4676 bytes
font_01_sfnt_off00007898.bin
d02a1be6d8ccdd48cdd53329c58ee2fe909f1e64e817d0d0ae4d61faedf3fffa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7898 10292 bytes
font_02_sfnt_off00009bd4.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD4 4324 bytes