Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf5a0f1f540552e…

MALICIOUS

PDF

78.3 KB Created: 2021-01-20 11:06:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 09294d6a3938e159ff9eb826fc2fe475 SHA-1: aa978cf43c972487a9e11a03faf39778b2d19e73 SHA-256: dbf5a0f1f540552e7554b0929790686a4ada1da6bbbd057a9ff8595e6c7b3918
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and employing UTM parameters for tracking, suggesting a link farm designed for SEO manipulation. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL pointing to known malicious redirector infrastructure. While no scripts were explicitly extracted, the nature of the link farm and the ML classification indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://traffking.ru/123?utm_term=minecraft+pe+mod+apk+uptodown In PDF document text
    • https://dapoxegimore.weebly.com/uploads/1/3/0/9/130969679/62f2c2a131e5d.pdfIn PDF document text
    • http://bepibolet.22web.org/fodudavaretot.pdfIn PDF document text
    • https://jepunitapo.weebly.com/uploads/1/3/1/0/131070437/zujuxotopugewigum.pdfIn PDF document text
    • https://site-1166655.mozfiles.com/files/1166655/space_jump_super_metroid_como_usar.pdfIn PDF document text
    • http://nofosofeze.iblogger.org/gototraining_user_guide.pdfIn PDF document text
    • https://site-1179316.mozfiles.com/files/1179316/vlookup_first_match_google_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/zokasejiz/5gdjfUi/40273936466.pdfIn PDF document text
    • https://lelamibi.weebly.com/uploads/1/3/0/7/130738841/wugovub_lezedozilolofad_rizudavatadi_fexalenugoge.pdfIn PDF document text
    • http://batezelokev.iblogger.org/ppl_electric_report_an_outage.pdfIn PDF document text
    • https://tobejisexin.weebly.com/uploads/1/3/1/4/131454505/3081434.pdfIn PDF document text
    • https://site-1177303.mozfiles.com/files/1177303/rowolaruwer.pdfIn PDF document text
    • https://site-1171585.mozfiles.com/files/1171585/feisty_sentence_meaning_in_urdu.pdfIn PDF document text
    • https://site-1168148.mozfiles.com/files/1168148/29946956280.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fizaxo/cardiopatia_isquemica_aguda.pdfIn PDF document text
    • http://mafefelanepule.epizy.com/8981405212.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/29514396482.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD280 5136 bytes
SHA-256: f15b5b85eeb159fdea8849cca114daa1e4884ea2b9ec27f3448d0fd901e6a60e
font_01_sfnt_off0000e3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E9 10588 bytes
SHA-256: 4cbf075741f8adb3057c2c3266c1cc276bfb486edeed6de98aeb64e79e8d854e
font_02_sfnt_off0001086c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086C 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073
font_03_sfnt_off00011d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D34 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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