Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa1beae8bd58aa7…

MALICIOUS

PDF

53.9 KB Created: 2020-08-29 12:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08cd3360971df1719910da0ae20e89c0 SHA-1: 2cddeb5da2b5e82421beb7ee9e06bd160f75b6ad SHA-256: 5aa1beae8bd58aa7f3885b770000ff28cacc8f56ba9ef38778c30b6114ed8841
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains text related to a mixer manual and the redirector URL, suggesting a lure to a malicious site. The presence of numerous external PDF links also indicates a link farm, often used to obscure malicious activity.

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.link/wix?keyword=behringer+eurorack+mxb1002+mixer+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_5e52b149b8db4caea6601ce0d164e053.pdf
    • https://static.usrfiles.com/ugd/b8c837_a49289018dd84a7f88afcfbded0bdc9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_10d67812611b4847826248b5193855b4.pdf
    • https://cdn.shopify.com/s/files/1/0444/4097/7574/files/vanagon_bentley_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5081520916.pdf
    • https://cdn.shopify.com/s/files/1/0440/2606/9157/files/full_albums_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0434/6678/4932/files/42077062.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6901/files/dufawipi.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce4c4a72dd684b3d8cac05042bed8cac.pdf
    • https://static.usrfiles.com/ugd/b8c837_808ed6bc52454164bcfb3ea2763fa2b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_5915ebbfb8bb455f8e6a356e97e78d53.pdf
    • https://static.usrfiles.com/ugd/b8c837_61705d94a7234f11af07d7fbdb21bd2c.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bekikelazipilexujewa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1935/4791/files/java_latest_version_free_filehippo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7548/4313/files/43004401800.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/snow_leopard_disk_image_download.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_off00009194.bin
84dd9112ffd5f005da96de99e4b8b101bdc007f9e1cd5af337f209bc32b696da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9194 5680 bytes
font_01_sfnt_off0000a4d4.bin
47f502417f1f7bbcd9a2fcf1cadea8bdefe16d2be4ff96cc858cd62f95f61025		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4D4 10572 bytes

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