Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c58db27866b56d…

MALICIOUS

PDF

46.3 KB Created: 2020-08-28 23:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 288e89b08fd6f37aff00b6f9b8491c62 SHA-1: e2e20707057de257c13323f9aa98ec1c5dcf3780 SHA-256: 61c58db27866b56daa448847c550cc905edf3a4ad252325a85e68da5e5b66147
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. The embedded URL, 'https://ttraff.cc/wix?keyword=yc7dk-+g2np3-+2qqc3-+j6h88-+gvgxt', is likely intended to lead the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to lure the user to a harmful destination, characteristic of 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.cc/wix?keyword=yc7dk-+g2np3-+2qqc3-+j6h88-+gvgxt
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/nazidovuwebetevojo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/kingdom_hearts_1.5_remix_ost_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/pulmonary_hypertension_classification_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/73676382282.pdf
    • https://cdn.shopify.com/s/files/1/0440/7744/9366/files/wefikonowevel.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7917/files/house_rules_for_roommates.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8607/files/21882020543.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/sutuzawokofed.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4503/files/chs_entrance_exam_paper_for_class_11_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/26800161182.pdf
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/93415293576.pdf
    • https://cdn.shopify.com/s/files/1/0429/1998/5319/files/malikez.pdf
    • https://cdn.shopify.com/s/files/1/0464/1357/8408/files/5183659500.pdf
    • https://static.usrfiles.com/ugd/b8c837_64a5360b754243ffa1bec505528476f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_897adf9c4edd4691803fa37a7a654b2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_51de7105e05e4e798e6da468956b3eb4.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_off00007032.bin
a7476913299d262d013c8beeb13dcb6dd29613c8098ffd55078ef808355992ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7032 5932 bytes
font_01_sfnt_off00008481.bin
1cbe5ac0efa039144d07885d37c801ffb56a84b3bebfda3fc5763c84e84e521e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8481 12540 bytes

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