Malicious PDF — malware analysis report

Static analysis result for SHA-256 f32523da4d78f18d…

MALICIOUS

PDF

42.4 KB Created: 2020-09-06 10:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6dfeb13cfb38e44d3a4069330c511133 SHA-1: 30376cfb54c1c1f21e095f4327f7b069c8f970e5 SHA-256: f32523da4d78f18d9ed623f1b0319bcdbe86e4f54272fd6f0945e2726a0e315e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to 'cyanobacteria algae'. The presence of embedded links and the ML classifier's high confidence suggest a malicious intent to redirect users to harmful 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/pify?keyword=cyanobacteria+algae+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/splash_splash_love_eng_sub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1975/3879/files/43584973610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3806/4296/files/regression_analysis_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/28835741089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/2827/4341/files/endo_and_exo_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3443/4974/files/wojenifex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1271/6701/files/mutoxirarajumiteb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ce4b7c_8e6b6bbccacc4df19e9ac6021f18fae5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b11f6d_3d462686582d4782aaf3f7d5e9d8986c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b7ab08_8195991f5a5f49b5adbe29881fc5b034.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0adedf_093b4f0add3f4553900ae4aac6d0d3f2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8b9728_cdcd0a23a87640a9a6598d326a24b8fa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b3bc21_bf1239a1056f4135b19e120ff59a207f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8e66a5_62bdd9e1b9b4401b941c1d3179780533.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E7 5292 bytes
SHA-256: a87c7f523de09b77d8aa0de26ff2c7624a297a25b89be56fe0479d10db1878a3
font_01_sfnt_off000079f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79F8 10408 bytes
SHA-256: 5c8f45f3663e701fd3e258830fad000998eb7e79734d600f4b5e883d31371d82

Open this report in the interactive analyzer, or submit your own file for analysis.