Malicious PDF — malware analysis report

Static analysis result for SHA-256 13ca019960c577e7…

MALICIOUS

PDF

44.6 KB Created: 2020-10-15 09:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: b477df4d8e895a8b5247025349ad4053 SHA-1: e171c53ea4739bdc84c54be2dad7cbf7ef9e1be1 SHA-256: 13ca019960c577e71ed1fb09bb43e75bc27c5bb5247dddb18af2e050fc3ce601
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://ggtraff.ru/123?keyword=sel+limfosit+adalah+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5f87c838cfaac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f86fcc09576c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f870bba5032c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5f87a745c9228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5f87d6c160268.pdfIn PDF document text
    • https://site-1041208.mozfiles.com/files/1041208/sisuxaxefanipelalez.pdfIn PDF document text
    • https://site-1041090.mozfiles.com/files/1041090/66491684386.pdfIn PDF document text
    • https://site-1042971.mozfiles.com/files/1042971/ladabikalivudiguj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/094d2a5c-def5-4afd-8111-728909a56c03/bamutipuxer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5167dad8-bbf3-4968-a368-b8b34fb250b8/vadesupowaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f521be9-ca39-4645-9337-b93eedb563c2/gafix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed4c196f-c4a2-47d0-bb3d-2c91be275d5c/zasapawilajokul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4229ccf-1828-4039-84a6-142abc5d2117/gomom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8129ba01-bf4a-4b9e-9823-48cf5dcc4ef3/fuzebukujamabepuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d3b2988-da70-4392-8ffb-4adcbba5fba7/48287848983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c672d509-c88a-41d0-9a0a-b086bbdd0600/1963428519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0020/4959/files/tokadejemisetulipubigatik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4152/0278/files/2007_buick_lacrosse_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3637/7756/files/picture_of_poop_with_blood.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1283/8808/files/bimagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3702/3641/files/hamilton_beach_commercial_manual_citrus_juicer.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_off000070d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D0 5288 bytes
SHA-256: 1cfd1598213dff3f0b7a7ad1ee0bd63ee7649623c5f0210d676978cf713f75f8
font_01_sfnt_off000082ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82AE 10136 bytes
SHA-256: 6f8ac0ff7510a586aa43cc424ef17379ecffb397f0fb4e6fa1e031a38c8e30c6