Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ca092eca265c8a…

MALICIOUS

PDF

44.1 KB Created: 2020-09-03 07:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94665366c31b167e82fb20994f77e2a9 SHA-1: 763dcd899656187c7c244607be7fcdbfaec02edd SHA-256: 04ca092eca265c8aee4678450cd6ddbaf19cb987c8f0c3ed7ae5ed1ee49637b7
162 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to 'accounts excel template', aligning with the SE_INVOICE_LURE heuristic. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or redirection attack.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=accounts+excel+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b4f0c6_1015862e1937419a8f8d6ee5d73f4197.pdf
    • https://static.usrfiles.com/ugd/7041e4_7a07685c02d94118a143504efac708d6.pdf
    • https://static.usrfiles.com/ugd/7f16bd_ea815c625a774b1dbd1759acbb15dfad.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_80286defc397438097e2a092288e5d65.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a498d95f1c549b0a84515fce544a631.pdf
    • https://static.usrfiles.com/ugd/d01287_14578b55a4804ff19af644e3a007e610.pdf
    • https://static.usrfiles.com/ugd/bfbc46_26a29e5144d44d2b8e48e9d18c12ffb0.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_976e758c64e24cce8c206926975bbe36.pdf
    • https://cdn.shopify.com/s/files/1/0439/1321/6168/files/gutima.pdf
    • https://cdn.shopify.com/s/files/1/0432/7813/9556/files/9516114431.pdf
    • https://cdn.shopify.com/s/files/1/0431/5483/3557/files/18214710624.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6264/files/building_control_act_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/puzimokanikesak.pdf
    • https://cdn.shopify.com/s/files/1/0434/4217/6150/files/formes_et_grandeurs_ms.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/rodukafezanebidumax.pdf
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/baxoju.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_off00006f4d.bin
0d2c88cbcfc678005b49fa2dd745a75aa1763088cea846f2f5d3e25ca03f5613		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4D 5040 bytes
font_01_sfnt_off00008065.bin
a77f2b5a7b30fe420a9e6fae47ee4e2b11fd5756a774b8de51ee226210f94822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8065 10332 bytes

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