Malicious PDF — malware analysis report

Static analysis result for SHA-256 30586da9e54e5fb2…

MALICIOUS

PDF

47.9 KB Created: 2020-08-29 21:51:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ba0b8e1d3deb8e3bb17f2201dafcaf1 SHA-1: 0ca01f1ae86a7af88e983189ed5d5bfcc6ef291b SHA-256: 30586da9e54e5fb2e1d0f03461c42bebef3ac598f45007827c3fde67a33f42af
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one critical heuristic identifying it as a malicious redirector. The primary malicious URL, https://ttraff.ru/wix?keyword=business+communication+today+11th+edition+pdf+download, is used to lure users into downloading a file, likely leading to further malicious activity. The document body and metadata suggest a lure related to a business communication textbook, which is a common tactic for phishing or malware distribution.

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.ru/wix?keyword=business+communication+today+11th+edition+pdf+download
    • https://static.usrfiles.com/ugd/1fbf8b_adce1db675004b12b5c92687d8355975.pdf
    • https://static.usrfiles.com/ugd/078c79_8c7ef51222204367889ffc87a97a2152.pdf
    • https://static.usrfiles.com/ugd/b8c837_893dac0340ab4e1f8b41f172dcd4a74f.pdf
    • https://static.usrfiles.com/ugd/b8c837_13281f00f0d746fb824f14a438d82bfa.pdf
    • https://static.usrfiles.com/ugd/b8c837_928d4ae96bb3437abc9af4af673dde39.pdf
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/rogumefajafevot.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/71531643531.pdf
    • https://cdn.shopify.com/s/files/1/0428/0107/0247/files/nitotuwew.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/levuketaditojenopiwege.pdf
    • https://cdn.shopify.com/s/files/1/0434/3804/7384/files/sirafanorupojemaredipowut.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/61362026127.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/keferejenela.pdf
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/37216589576.pdf
    • https://static.usrfiles.com/ugd/b8c837_8012811e613d4442b9bae7f5fa8b8c84.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_0243f32256204992b7344b95ab021eaa.pdf
    • https://static.usrfiles.com/ugd/b8c837_531bfd49a313432182eb865a40269856.pdf
    • https://static.usrfiles.com/ugd/de65f7_d31cdbd27a7444178228617d0229e700.pdf
    • https://static.usrfiles.com/ugd/b8c837_654318febe3c4c898b880f985123ceab.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cd0.bin
813d2507aa2d24ea882ea56a2b3253c71df189857aaf7a81da5eea93778991e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD0 5596 bytes
font_01_sfnt_off00008fca.bin
8db016a6dc44b570458920b6083a328f37c2993de648bcb9d6187fb93b41af69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCA 10120 bytes

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