Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc5e89e6821f1d9…

MALICIOUS

PDF

77.7 KB Created: 2020-10-31 08:35:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 748478a5e943e9a4e355673d89adc721 SHA-1: 2772650603b68d7165a4814499d1eb1a7885e32e SHA-256: abc5e89e6821f1d92508a5616f97f65957f5c0483af7615386e4a6bc1575ca26
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external resources, many of which are part of an SEO link farm designed to redirect users. The primary redirector URL is identified as malicious. The document body, though heavily obfuscated, contains the URL 'https://gettraff.ru/aws?keyword=harvard+college+confidential+2024', suggesting a lure for confidential information. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/aws?keyword=harvard+college+confidential+2024 In PDF document text
    • https://nizomepovunamox.weebly.com/uploads/1/3/4/3/134305669/a87fde89.pdfIn PDF document text
    • https://lajawenofuki.weebly.com/uploads/1/3/4/5/134501859/274d5.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/buvabugugeni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5f8a954542a24.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/351950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f9bd7b83592e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f8750cceda51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_5f922d07d7f50.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/bewomo.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/4401886.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/1/0499/9263/0427/files/southwestern_city_schools_ohio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b539ff3-5135-4794-bdf3-645a52f9d8a3/the_dumbest_generation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/3360/0415/files/des_moines_imax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1325/7396/files/dead_trigger_2_apk__data_offline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1968/8865/files/vanolirorawe.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FA 5392 bytes
SHA-256: 63494af94ea7c7ef67b9caad8bb9f4305722f4ee1d0151cc1093d9cb1945ac4a
font_01_sfnt_off0001086f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086F 9848 bytes
SHA-256: bd5017c908c8394acfacb417231dff67a34fbd7d81bf8af32804f41f55a613bd

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