Malicious PDF — malware analysis report

Static analysis result for SHA-256 730d344eee0f7f2a…

MALICIOUS

PDF

45.0 KB Created: 2020-09-13 01:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cc767579a7ee264b8fcd88f01dc6e95 SHA-1: 1993d7209d03aa4c59fbfc4f6c0c934cce12f0a7 SHA-256: 730d344eee0f7f2aab663f114f95b8238a046e2738dad366005105bcf4abb11f
162 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious domain, likely as part of a phishing or scam campaign. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the redirector. The presence of numerous other PDF links suggests a link farm or SEO manipulation tactic to obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=vigilant+citizen+book+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8266/1532/files/vusavo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1659/1272/files/91512578024.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4585/files/deremobafuvapopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6901/files/free_writing_paper_template_for_first_grade.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/zadekozidowidef.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/bexixivejafoviwazuwatoju.pdf
    • https://static.usrfiles.com/ugd/e2b09b_f3c55ef665db4b828d46ce5618e8a1b7.pdf
    • https://static.usrfiles.com/ugd/9cc572_ff4b58c3c4c14706a42c772efe0686c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_b93d950c2a7e4f6da9e99500f0a1e7d0.pdf
    • https://static.usrfiles.com/ugd/69695d_513833ea8362421a98b8fe85599b5a89.pdf
    • https://static.usrfiles.com/ugd/25c42e_ffefe47e06a542b2a58e13f3514514bd.pdf
    • https://static.usrfiles.com/ugd/2813e2_18ff2dad8ac94e5f820494f184e746cd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064bb.bin
4d8318011c2a612481518afafd292980ff4e7e19cccea062f1d885a12ab62b64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64BB 5056 bytes
font_01_sfnt_off00007608.bin
34c0f1c292ae4a655305d46b33029d6d8bf275ef05f89d117c54ba022c9ad010		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7608 10328 bytes
font_02_sfnt_off00009964.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9964 4324 bytes

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