Malicious PDF — malware analysis report

Static analysis result for SHA-256 9931716665c07dcd…

MALICIOUS

PDF

49.6 KB Created: 2020-10-22 18:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: dbb8b2c4ed15b27100c584088041176f SHA-1: 3fecd136652bbf07f3818a88c875a87579ceb753 SHA-256: 9931716665c07dcd95e0e8faa977800c96164481d8d61a9d5264084d2437c576
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://gettraff.ru/strik?keyword=harry+potter+acceptance+letter+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393908/normal_5f8ea3faad709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5f893ec6111fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f8fbd00031aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5f8c15567c406.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/kegamibiberejaxapofe.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/kanesawipe-dirom-pokatakowudidev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f86fe9e0e6ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f8728b437e1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f8949ce2307d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f91074e9df32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f8ebc9b935f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/subud/bhagavata_purana.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/light_reflection_and_refraction_class_10_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/bobomezapegurunomib.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/74851687882.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/70868243551.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/air_pollution_cause_effect_and_control.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/everything_about_stock_market_india.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/castrol_edge_professional_h_c2_0w-_30.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2310/7749/files/duxeruvugif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9014/0064/files/vekuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/45078475724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4154/4599/files/95635377151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8646/2106/files/79837111547.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_off000082b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B2 4964 bytes
SHA-256: bae8e689bb81b629db34c82a7f22c78264eb99090f3519323d0d510569281217
font_01_sfnt_off00009387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9387 10972 bytes
SHA-256: 152e99cc68c11213a903c9e1797b35182bd8268fcba9f5e7bd84754814ba8b9f