Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b3a475e9663efd…

MALICIOUS

PDF

42.2 KB Created: 2020-08-30 05:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6f1f8bfd9f6f68a7e721ae2e3e31329 SHA-1: e3fe24c142f3943e82bbf09075dd0578e0ba278f SHA-256: 64b3a475e9663efdf195dd05c286b8ca17f987a54693266c4fe6c78d8da11da4
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to search queries, suggesting a lure. The presence of numerous external PDF links further indicates a link farm or redirection strategy. The ML classifier 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/wix?keyword=diferen%25C3%25A7a+entre+liberalismo+e+neoliberalismo+brainly
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ae15ca_599ce784cbcf4400aa9af0003b08d41d.pdf
    • https://static.usrfiles.com/ugd/c162b3_d8c3332ab61d42e69331682e0b0f2d70.pdf
    • https://static.usrfiles.com/ugd/7198c1_058efda2e95941bcbd027dbf3fa8ab9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc902adb3b6844d4bca6e174d3780f15.pdf
    • https://static.usrfiles.com/ugd/36f25b_e8ddb974f8c5449dac49b62746ffa4d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_e00a3a6dbe5044e19e79717ded6e2396.pdf
    • https://static.usrfiles.com/ugd/b7ab08_3ee793436a6c4430b8b90899cde5c4e3.pdf
    • https://static.usrfiles.com/ugd/8b9728_f0bd1c66b852472b980168ec02be876d.pdf
    • https://static.usrfiles.com/ugd/b8c837_149928f1bd4a4ddb87ba87799a200367.pdf
    • https://static.usrfiles.com/ugd/b4609a_f9c3cf17683e489fb39028bc7077f3d1.pdf
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/31545294351.pdf
    • https://cdn.shopify.com/s/files/1/0430/3775/3493/files/accelerometer_example_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0503/files/tifazazomaxepiwesovuxogak.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/91692983945.pdf
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/calculating_average_atomic_mass_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/conducting_and_superconducting_materials.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000603a.bin
f9fdb58917a5b1e573ddbb13310c6e42be0067b84c45678e32e7b7b99d28c339		 pdf-font-stream PDF embedded font (sfnt) at offset 0x603A 5336 bytes
font_01_sfnt_off00007252.bin
63e59e619c4b1ba4d5816fc8cacdcbb06bc9b680803d94635b18719bdafb7812		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7252 13108 bytes

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