Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a89d50e41112bc…

MALICIOUS

PDF

40.2 KB Created: 2020-08-30 12:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e5662a09218be744608551d4881246d SHA-1: c3fbdf2d399d65581158250ae46706c5f4abf9dd SHA-256: 62a89d50e41112bc92dd04ca0ac11ed20210658b52b324b8f464263c3a7fb487
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with the primary URL pointing to a known malicious redirector. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links, suggesting a link farm or redirection scheme. No scripts were extracted, but the presence of numerous links indicates a potential for user redirection to malicious sites.

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=teen+titans+raven+and+beast+boy
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_278e3a57eae84c0eab8999e0be6f1c5e.pdf
    • https://static.usrfiles.com/ugd/b5472a_b9fe71d347ec470bb2d66bb2ce42a7d1.pdf
    • https://static.usrfiles.com/ugd/1f5cef_8bb062c279aa4f8e98c6075f33214ae9.pdf
    • https://static.usrfiles.com/ugd/865d50_5e3be1fa59ce487889d2e3e3882344ae.pdf
    • https://cdn.shopify.com/s/files/1/0429/1297/2963/files/what_is_hacci_knit_fabric.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/asciidoctor_image_center.pdf
    • https://static.usrfiles.com/ugd/b8c837_407c605c881c44f1a4d6a1741ebced12.pdf
    • https://static.usrfiles.com/ugd/b8c837_838b1f6d921a45f588b90eeb6c1afaef.pdf
    • https://cdn.shopify.com/s/files/1/0432/0519/7985/files/jetifivusepineduj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/tekojawolide.pdf
    • https://cdn.shopify.com/s/files/1/0436/6001/7814/files/biografia_allan_kardec.pdf
    • https://cdn.shopify.com/s/files/1/0435/5473/4241/files/32950777938.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/felekaxugumol.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_off0000609c.bin
c1bac72f3f532fa97bf7a14c09bcfb488dbeed1dc3a5f3606e4975ed38808654
pdf-font-stream PDF embedded font (sfnt) at offset 0x609C 5036 bytes
font_01_sfnt_off000071cd.bin
8a633f59a38c693657d1efc36e97017ebc014c43720e4eb7e7a9b04d11361761
pdf-font-stream PDF embedded font (sfnt) at offset 0x71CD 10044 bytes