Malicious PDF — malware analysis report

Static analysis result for SHA-256 22bd7ddf500e6436…

MALICIOUS

PDF

45.4 KB Created: 2020-10-12 08:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: a0e6cf69c65a95806f31d8678d650abd SHA-1: 0a79b2fe09823bc4d26e732fcd48ee00878f7711 SHA-256: 22bd7ddf500e64368678cbf9c297a0223a6cea9f5fc6a3dd1e29d604f2f01a75
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.club/pify?keyword=calendario+escolar+2015-16+sep In PDF document text
    • http://files.aitorrogophotography.com/uploads/1/3/0/7/130738720/d193c29.pdfIn PDF document text
    • http://files.donalcox.com/uploads/1/3/1/3/131379434/4ca63e91.pdfIn PDF document text
    • http://dimem.captivachapel.com/uploads/1/3/1/4/131437436/6e6d1fd0db1.pdfIn PDF document text
    • http://jetir.kartchnersspecialtymeats.com/uploads/1/3/1/0/131071117/dadugukumapof_tekogaximefozu_dipazebebu_vesadaxofufagow.pdfIn PDF document text
    • http://fiviwox.flushingfutbolacademy.com/uploads/1/3/0/7/130775934/aa0ab.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/b73fad72-d2af-4c2e-8fe7-eb33d8bf8a09/zifojesapiton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b3d4a27-8383-45b2-94b5-11c4f608f265/sagoxuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c985112-399a-4624-8387-8349cb330ec8/jukepefojexebudojojajajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4823/8241/files/nissan_estaquitas_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7731/3727/files/super_mario_logic_in_real_life.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4276/2663/files/letters_to_a_young_contrarian_by_christopher_hitchens.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4714/7925/files/27727737660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/mibivibesalazopevupud.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_off00006f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F57 5608 bytes
SHA-256: 8b604c9853925f4479eb5ea9534bc5c14cca5c2999819dfa141c2475451ccebb
font_01_sfnt_off0000827f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827F 11224 bytes
SHA-256: accf0e5cfb6f8626e7a25674cbe97a1b33f30b8824addd1d8f669a930a6a8de5

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