Malicious PDF — malware analysis report

Static analysis result for SHA-256 82e640deae860977…

MALICIOUS

PDF

41.6 KB Created: 2020-10-04 11:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 24bd2d8f6756dde7b353d3ace0d1ccbc SHA-1: e2be07e094f3c8051e8294c3c6426681c7fceec2 SHA-256: 82e640deae8609770fcdb7b42edec9b5b39687dbf8b0f982d06cce1b38c6a6a6
184 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links pointing to various domains, indicating a link farm or SEO spam campaign. One prominent link, 'https://ttraff.link/pify?keyword=smithtown+high+school+west+ranking', suggests a potential phishing lure or redirection to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=smithtown+high+school+west+ranking In PDF document text
    • http://jizemereb.bluedahliamakeup.com/uploads/1/3/1/3/131380969/bowufazelokuleropuwe.pdfIn PDF document text
    • http://lilalof.jmcks.com/uploads/1/3/1/6/131637257/nakebeligetimugafipu.pdfIn PDF document text
    • http://vorebotur.harbourstreetjazz.com/uploads/1/3/1/4/131454065/6729970.pdfIn PDF document text
    • http://lebed.macarthurjrotc.com/uploads/1/3/0/9/130969483/litaxijiwipajegalutu.pdfIn PDF document text
    • http://files.the-christlieb-group.org/uploads/1/3/1/3/131384171/4729121.pdfIn PDF document text
    • http://files.janeymoffatt.com/uploads/1/3/0/7/130740412/puxajewelimaxuwivu.pdfIn PDF document text
    • http://files.dianekatzman.com/uploads/1/3/1/8/131855992/xufonekijexas.pdfIn PDF document text
    • http://files.pleasantlivingmagazine.com/uploads/1/3/0/7/130774990/8eb868aca3b8.pdfIn PDF document text
    • http://tiwabagaj.nourot.com/uploads/1/3/0/8/130874364/abbe749c24.pdfIn PDF document text
    • https://site-1039873.mozfiles.com/files/1039873/25954292062.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/tatepuwomobudasizi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3600255-7607-46e5-bff9-394e69192446/52531999580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eabefb64-f840-40b0-9052-32cf6bd27d5f/79623540922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d666680d-5ee1-4f4a-9758-6ae9c08f52f3/wiberebinonanarakiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39934d59-fec4-49eb-8758-c1608f5d5a49/48279595313.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_off0000647e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647E 5472 bytes
SHA-256: 97e670fcd7c42f1b1eb5a67cf754c5e87ff7e3a7adaf30e9a6c1a7e14e770087
font_01_sfnt_off00007706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7706 10072 bytes
SHA-256: 5a58c61c4c257a31707eb1186f70c9177a746b105a3acb8b997b48d072a20ece

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