Malicious PDF — malware analysis report

Static analysis result for SHA-256 7292be3f41815b89…

MALICIOUS

PDF

39.7 KB Created: 2020-09-05 15:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e3410e61e1e48888932685462cac696 SHA-1: f69cb4e7d3cd5248148dc42bb06e64c36a543397 SHA-256: 7292be3f41815b8959e607e710c34fe2323f28118210c6b7026e5c7a17fe3ec1
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external PDF links, suggesting a link farm or redirection tactic. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for a scam. The presence of embedded URLs and the ML classifier firing strongly indicate malicious intent, likely to redirect users to malicious infrastructure.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=auto+level+parts+and+functions+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/valentine_day_week_images.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/kijuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/4167/7731/files/jobepe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1384/files/girejijo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4167/5685/files/vibirar.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6346/files/16627494741.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/sanumuretagopezilolewanen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9524/5475/files/lonenep.pdf
    • https://static.usrfiles.com/ugd/0d2908_69f4c092511540188c9cd0864f40f085.pdf
    • https://static.usrfiles.com/ugd/f103bb_7c092fa2fcde47a2a6811c2f45109ddd.pdf
    • https://static.usrfiles.com/ugd/b8c837_132b69ffa7884215a1e977c4c89356e1.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1957/files/susarodogezuditawum.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4385/files/fokufigakugubodifag.pdf
    • https://cdn.shopify.com/s/files/1/0440/7227/2037/files/tafopebos.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_off00005d8b.bin
33038636115192af5be5b70795e7f00711242c858d0cf410bd74830f3469c219		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8B 5196 bytes
font_01_sfnt_off00006f52.bin
02d001f1deed769aa1aa83ec5f394149d66360296567fa58fbaaecd0a69f99f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F52 10128 bytes

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