Malicious PDF — malware analysis report

Static analysis result for SHA-256 462fad409bccaacb…

MALICIOUS

PDF

39.4 KB Created: 2020-11-02 20:04:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e42d2981dd599d6e3d6d33ad3f013954 SHA-1: 95e78c88a18b71bb0f0bad6a401f4f162c5bd5b9 SHA-256: 462fad409bccaacb566cc2b6af4a70f4445c945bf188ef3c5581d88b09b8368f
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded URLs that point to a redirector infrastructure, which in turn leads to various PDF files hosted on Weebly and other platforms. The heuristic firings indicate that this is a malicious redirector and an SEO link farm designed to lure users with free download lures. The primary redirector URL is https://gettraff.ru/aws?keyword=rock+paper+scissors+c%252B%252B+code, which likely serves as the entry point for a phishing or malware distribution campaign.

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=rock+paper+scissors+c%252B%252B+code In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403131/normal_5f9ba607c018a.pdfIn PDF document text
    • https://zabapekiji.weebly.com/uploads/1/3/4/4/134470890/bepugodaz_migemo_fadaduposegebi.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/juvuxisodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5f9efb7b00874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5f8f410238420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370299/normal_5f8a087b38e38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415068/normal_5f97210e8d864.pdfIn PDF document text
    • https://jinezosibe.weebly.com/uploads/1/3/4/4/134454760/nobekon-molawiviwikak-dawurok-temowo.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/c3bb23995.pdfIn PDF document text
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/4740979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415322/normal_5f9d6ae020f12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5f892bfe868b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392667/normal_5f935bbccbf7d.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/giruxovipoto-sivediberapuno-wasikupevexoxog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000596a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x596A 5104 bytes
SHA-256: b93600ff81ae9dd48e8f7960de8aa68b874ace8363541f5304e6272efe71b7c2
font_01_sfnt_off00006adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADC 11244 bytes
SHA-256: 152957e046c0485b2255ccc0002acfcd68e75d1fa52c6b385115a4c0f72f1213

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