Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8726b964c20c5d…

MALICIOUS

PDF

36.9 KB Created: 2020-10-09 04:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 51431d322d9e10240d7d8b929c9a23ee SHA-1: 541cbf3864071015e079e0ddfb9cafa73c7b18c6 SHA-256: 2f8726b964c20c5dd33d1d421f6c60986cc21458284cab4e4e065dfde72df4ae
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to redirector services and disposable hosting. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'high school musical 3 songs lyrics', which then redirects to a malicious ttraff.link URL. This suggests a link farm or SEO poisoning attack designed to drive traffic 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=high+school+musical+3+songs+lyrics In PDF document text
    • http://legaviro.thegatesmillsgardenclub.com/uploads/1/3/1/3/131381761/pewumixi.pdfIn PDF document text
    • http://files.humanities.shenfieldlearning.com/uploads/1/3/0/7/130740617/923464.pdfIn PDF document text
    • http://sivobo.andigeloolaw.com/uploads/1/3/0/7/130738755/8603547.pdfIn PDF document text
    • http://dabis.larasanusi.com/uploads/1/3/1/3/131379326/jibozemuz-rejiraxiso-gikurufenoge-gafewuzup.pdfIn PDF document text
    • http://gijix.usasubs.com/uploads/1/3/0/7/130776068/sejup_nuwuves_pavofara.pdfIn PDF document text
    • http://files.noamonn.com/uploads/1/3/2/6/132695701/9453920.pdfIn PDF document text
    • http://wetuf.centraliowaasg.org/uploads/1/3/1/4/131406507/8589634.pdfIn PDF document text
    • https://site-1038497.mozfiles.com/files/1038497/14403789223.pdfIn PDF document text
    • https://site-1039307.mozfiles.com/files/1039307/temotekukijavirideparo.pdfIn PDF document text
    • https://site-1040391.mozfiles.com/files/1040391/23140204054.pdfIn PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/jeniguxuparen.pdfIn PDF document text
    • https://site-1044472.mozfiles.com/files/1044472/lavudugu.pdfIn 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/1/0433/9374/5046/files/49582128380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1812/4445/files/small_k_in_cursive_writing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0536/4392/files/vodka_on_the_rocks_with_olives.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9213/1484/files/microsoft_access_2003_tutorial_for_beginners.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_off00005203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5203 5440 bytes
SHA-256: e41a1ec28ae8a9e8c2c394d6443e077f6b4d1a904e1c45185cc7f2d0683feb0a
font_01_sfnt_off00006464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6464 10108 bytes
SHA-256: 94d580b3155c18bea8d213a633faa18df4b6b181d5da94e445a1ed5ca13f3767

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