Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c3a62573dfa5fe…

MALICIOUS

PDF

53.1 KB Created: 2020-08-11 03:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 38b5447353bc6317f1f392314a4e462d SHA-1: 30b485077d12ebd6adbdc1da1a2cf6fd6d6f5738 SHA-256: 22c3a62573dfa5fe48f8d3cf37edfd8bdc541930b0e1823fe00313455eb09c01
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.ru/pify?keyword=bullish+and+bearish+chart+patterns+pdf In PDF document text
    • http://files.thursdayisthenewfriday.org/uploads/1/3/1/3/131383398/sofaraf.pdfIn PDF document text
    • http://files.ememathshub.org/uploads/1/3/1/1/131163833/642c10b4a6299e5.pdfIn PDF document text
    • http://ganife.consolegamingcrew.com/uploads/1/3/2/6/132682646/pedinod.pdfIn PDF document text
    • http://files.highctom.com/uploads/1/3/1/8/131872138/7212115.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/1/0433/0687/7080/files/tepumesuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8025/3593/files/25027751785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/wozinud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2154/1271/files/nusakaxodadifuwilobib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/sample_application_letter_for_teaching_position_in_high_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6678/3899/files/65070351878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/vanomidotof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/nogun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2253/2251/files/descargar_biblia_de_estudio_thompson_gratis_en_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wurawosupamajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0936/7461/files/dedutipikimasobakosup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/mcdougal_littell_algebra_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/gimp_2._8_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000877f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877F 5432 bytes
SHA-256: a5857f3c5ad4c2c37dec1a17e5f2e8c7751c3c85f1bf253a1ea8470f4138907e
font_01_sfnt_off000099d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D6 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000a263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA263 10680 bytes
SHA-256: 6417aa1a765a8d2c1df2f9eda8d7d1e3ccd2fafeef8d4f12ac9a0176129162f2

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