Malicious PDF — malware analysis report

Static analysis result for SHA-256 8779eddb23befc36…

MALICIOUS

PDF

46.5 KB Created: 2020-09-13 00:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 40a524a0babc31918e1e762e66c8ddee SHA-1: 16bceef811de1b5284948a48da37dafe6c9ed590 SHA-256: 8779eddb23befc36ad712f2e7ed2f7200667544f57c2b1bae2464b0265f8cfe8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links. One of these links, https://ttraff.club/pify?keyword=eastern+woodlands+native+american+clothing, points to known malicious redirector infrastructure. The document appears to be a link farm, potentially for SEO manipulation or to distribute further malicious content, as indicated by the PDF_SEO_LINK_FARM heuristic.

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.club/pify?keyword=eastern+woodlands+native+american+clothing In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/7e84b7_545cf807a8ac4fb19bbc18908de0339d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1c90dc_7ba243165fd745458d33a7277af4f514.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5cf23b_a7e0afcee1b54036870a1ba3f3ec31e2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7e6083_9b612a3328274b888c782bfa1558119f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5899d5_21e6c88424d44aec9a434ec8834930fc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/113e89_be159cc8600d48ddb4b25efb6f005329.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/850f07_11a5c1fed6e84feab77ccf77be38c996.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a18aa6_3c34e572147e440bbbc139ad88be699b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/436160_553e59103fbf404584f5172cbf7a0c7d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_27b7198306ba4d5b884ecc6602194a77.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/12dc78_87fdb5ed788440239da65fe5d61e1fc9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/23e9be_376c4bcacacd4ba58efad6a3538da44a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d32f78_5279a4209fd04fb1a3cd5b5b6bb2304d.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_off00007725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7725 5460 bytes
SHA-256: 036d3bb20adeace31fd8e75de52df9c0d7f4cd48397f46f35930e3fc27e5d6f4
font_01_sfnt_off000089a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A5 9948 bytes
SHA-256: 800f78cc919987ff48e4b001e320772b15a29fc6560ebd9cc20f579a4db9a7a7

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