Malicious PDF — malware analysis report

Static analysis result for SHA-256 177b618e995e221d…

MALICIOUS

PDF

32.1 KB Created: 2020-09-03 02:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b85521d17a57bc5c1769ead07cb9ec5d SHA-1: 9cb0cd71583fef17c2f4fda0eaf55d21c5333546 SHA-256: 177b618e995e221d4736154239ecc38d8a6a8ddb2b8f3431beca3e8b88661908
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document's content and heuristics suggest a lure, potentially for remote support tools or phishing, and it is flagged by an ML classifier. The presence of multiple external PDF links indicates a link farm strategy, likely to distribute malicious content or host phishing pages.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=advanced+info+service+plc+annual+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/fedf23_1e55cf4aa9a941a1be39fb5c0eb60b72.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d175c591d8d45b98a37a652e5fb167c.pdf
    • https://static.usrfiles.com/ugd/b8c837_54747d7996d7449ebdc7dc3d22e5f778.pdf
    • https://static.usrfiles.com/ugd/bfbc46_77aa2fa3ebd44deb8ff55bee021caff3.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/41869091218.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80789229335.pdf
    • https://cdn.shopify.com/s/files/1/0430/3172/4183/files/luledexubibuwebo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1841/files/vonapirazidosukasak.pdf
    • https://cdn.shopify.com/s/files/1/0430/9526/1333/files/gizozemef.pdf
    • https://static.usrfiles.com/ugd/defdb4_b37aa12a4a8c41cd81a16d3257a2dea0.pdf
    • https://static.usrfiles.com/ugd/63f22d_2ad4cb0387d84cf4bfa035d309663f41.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_off000041d9.bin
430b16d34fde1576b4e5e7c8cd5013737e887329cf707d52bd92ef44f5c850a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x41D9 5196 bytes
font_01_sfnt_off0000539f.bin
e22233bb2a18a2c2c29a7ac5c23d74b8426ea915c394821f7b0b0faac0579200
pdf-font-stream PDF embedded font (sfnt) at offset 0x539F 9472 bytes