Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a9767229662639…

MALICIOUS

PDF

38.7 KB Created: 2020-08-29 12:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41467a62369e5c514c5833a8d3bd3563 SHA-1: 185ed9711f51df76df6905d8129e9ba25848cbfd SHA-256: 62a9767229662639a180151ea13431ce617b90862985fe7a6699a7cd02778212
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.com, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to woodworking plans, suggesting a lure to entice users to click the malicious links. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.com/wix?keyword=woodsmith+magazine+trunk+plans In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6822/6725/files/35370838091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/59649982892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3345/1926/files/47520427227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/gojegenidijefur.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3d441e442d24465d8a858796d771ab93.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/162fe6_78e7f7d43bea4e29a61c6faa6ac0d143.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_012eaa64d26d44bcacde788e94d234b1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9f30747a89bc433787fca59258c21f10.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c92483f654da4abebf15557d295bfa6a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e8887397d2084df086cdc1617904da89.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_808ed6bc52454164bcfb3ea2763fa2b2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b224d8e76dea45cda904ec41700dd946.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c3548c_344cf371848b4acd9401657388ebc763.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_8f8ef4fdabd7440c9452d65214075379.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f76e49bd4db54925b40a48ba9ca7779d.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005808.bin
4bae0d5a2da31828a282b8da6d1a21227bc9a59abd7507c83641c070aa6a197c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5808 5500 bytes
font_01_sfnt_off00006aae.bin
a0d91d56608abeee9c118c4f666c912ef19c90aa92ae2d0f1d67ec8860c0b2e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAE 10600 bytes

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