Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eccd52e282183ba…

MALICIOUS

PDF

40.4 KB Created: 2020-09-20 12:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8aa147d82218417f6fcdfb7abcc1cb90 SHA-1: 2beba35c4eab4ce7bbadfd21e397c97f66a0dd03 SHA-256: 9eccd52e282183ba6c2b0337cae5262a4bfebc71740cfaf90052a2d96fdec49c
194 Risk Score

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://ttraff.cc/wix?keyword=the+digestive+process+begins+worksheet+answers In PDF document text
    • http://files.mnjrc.com/uploads/1/3/0/8/130874110/7734714.pdfIn PDF document text
    • http://files.aoa-ne.com/uploads/1/3/1/0/131070678/jetuz-nidulamiboker-lepasabumepir-lepidapegun.pdfIn PDF document text
    • http://files.karynamira.com/uploads/1/3/0/7/130739007/bovegenadagu-zotuse-xatiru.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/1/0431/5247/4280/files/92311823539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/25395140846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1872/9125/files/dukurominukitugejosipuri.pdfIn PDF document text
    • https://ba41ef2e-acda-4693-b5fe-9c5d77b57da5.filesusr.com/ugd/d775a9_d4c3b609a24c43449f46523f91424e9a.pdf?index=trueIn PDF document text
    • https://8a001020-1418-4fcc-aaa1-baf88e484255.filesusr.com/ugd/5f226e_1df472b30bc74aad830d545838142061.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5790/5818/files/nebuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9506/9343/files/dekokijorawemexipobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5338/7674/files/three_way_anova_calculator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3984/2719/files/ruwazovafasidixorene.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_off0000625c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625C 5608 bytes
SHA-256: dcff785e94c92d67c0ae4ae1300e236ff02e0a47936d07aa8bdab2661d6f98f8
font_01_sfnt_off0000757b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x757B 9216 bytes
SHA-256: 78bce69b1d1e249df3538346acf55677aff3d6d4ce7f7afffc1a3267181237d2

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