Malicious PDF — malware analysis report

Static analysis result for SHA-256 1808f08cd0b7fea5…

MALICIOUS

PDF

36.3 KB Created: 2020-10-03 16:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bb08d1e4715c7121652d4720e2b0885b SHA-1: 5d18d50575127a7d666d445bc80656b48108fb93 SHA-256: 1808f08cd0b7fea5111a2801bb46f80b56f4c3f556e9ff00a33618fdf768d38f
164 Risk Score

Malware Insights

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

This PDF document functions as a link farm, embedding numerous URLs that redirect to potentially malicious content. The document body contains text related to hair genetics, likely as a lure to disguise the malicious intent. The embedded URLs, such as 'https://ttraff.link/pify?keyword=is+curly+hair+always+dominant', are indicative of a phishing or redirection scheme. No scripts were extracted, but the PDF structure itself facilitates the 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=is+curly+hair+always+dominant In PDF document text
    • https://site-1037849.mozfiles.com/files/1037849/duvuganawuwozoxaguxiwida.pdfIn PDF document text
    • https://site-1037175.mozfiles.com/files/1037175/41879727898.pdfIn macro / runtime command snippet
    • https://site-1038949.mozfiles.com/files/1038949/2125090079.pdfIn PDF document text
    • https://site-1036884.mozfiles.com/files/1036884/28044220290.pdfIn PDF document text
    • https://site-1037883.mozfiles.com/files/1037883/lirugukamupazilagurata.pdfIn PDF document text
    • https://site-1037077.mozfiles.com/files/1037077/66105172264.pdfIn PDF document text
    • https://site-1036742.mozfiles.com/files/1036742/woxizabadido.pdfIn PDF document text
    • https://site-1038794.mozfiles.com/files/1038794/senibe.pdfIn PDF document text
    • https://site-1036805.mozfiles.com/files/1036805/8456148372.pdfIn PDF document text
    • https://site-1037849In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/99f64af2-459f-440a-878d-6638d53e31d8/tofotologikamasipevopade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40162786-7771-4146-989e-edbe7666e05b/vagejadipuwelokuzojom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/684b2c66-96a7-442c-bffb-ac7197a31a1f/moborajawog.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_off00005087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5087 5312 bytes
SHA-256: 756c2f9d8ff1dd30c8575365abfb4fb19f820fe7b43de2ed1cea7b7cce07c537
font_01_sfnt_off00006280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6280 9916 bytes
SHA-256: b3a816be22985cb564d55f17575e0f61c875e6d44f6b24d1fc91650d86c03f8a

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