Malicious PDF — malware analysis report

Static analysis result for SHA-256 171d4611675c5707…

MALICIOUS

PDF

50.5 KB Created: 2020-10-10 06:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: de35662ffd1003ff324797e5a48f6226 SHA-1: e8c46257764eee3bb96dc8055ef7a46ab17d154f SHA-256: 171d4611675c5707ee50dfe4264a7c72bdab377b1fdc1d3c5399e5d384d3bf2c
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://cctraff.ru/strik?keyword=the+360+degree+leader+book+summary In PDF document text
    • https://site-1040561.mozfiles.com/files/1040561/ribojujumuzaren.pdfIn PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/misitavo.pdfIn PDF document text
    • https://site-1044313.mozfiles.com/files/1044313/89097768535.pdfIn PDF document text
    • https://site-1038416.mozfiles.com/files/1038416/63719943009.pdfIn PDF document text
    • https://site-1042540.mozfiles.com/files/1042540/gagalulidufatikabuzobufob.pdfIn PDF document text
    • https://site-1037902.mozfiles.com/files/1037902/goposezijubadibaluxap.pdfIn PDF document text
    • https://site-1042785.mozfiles.com/files/1042785/rafujevitomumi.pdfIn PDF document text
    • https://site-1038553.mozfiles.com/files/1038553/72122345467.pdfIn PDF document text
    • http://files.friendshipcharitiesinc.org/uploads/1/3/1/8/131871569/4525162.pdfIn PDF document text
    • http://files.robertknudson.com/uploads/1/3/1/4/131408798/forolevorixodevubej.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/1/0432/6565/4939/files/33377199285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/weather_review_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6175/5547/files/bath_and_body_works_white_citrus_shower_gel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9018/9215/files/gowifukevararuzoraboki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0156/3304/files/movafazuzofakozid.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_off00008706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8706 5956 bytes
SHA-256: fd64f9a55ae6b8a1947b6bff31e1c20d8927729a9a0c3ff68c366d96a743f2e5
font_01_sfnt_off00009b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B20 10008 bytes
SHA-256: 1e1722cb196c367ce5cd85eeeb93e1dfd02af0f31c154c22f81e0ffd4be99b6c

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