Malicious PDF — malware analysis report

Static analysis result for SHA-256 945ce2afd399740a…

MALICIOUS

PDF

58.8 KB Created: 2020-10-12 11:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 204c19b965ab733debd345795cb7828e SHA-1: 9b5328c12f16468719a96b4cbfe02d1ef4b2eedf SHA-256: 945ce2afd399740a8d21111a54d17c7625e9e929567edf3203067a1505329851
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.link/pify?keyword=pubarca+e+telarca+pdf In PDF document text
    • http://files.13thguardspoltavaskaya.com/uploads/1/3/0/8/130873975/xuzitotekakitowa.pdfIn PDF document text
    • http://files.jennymartinbooks.com/uploads/1/3/0/7/130740175/tapof.pdfIn PDF document text
    • http://texojaxo.kansasbusinesscouncil.com/uploads/1/3/1/3/131378932/cc45f5177.pdfIn PDF document text
    • https://site-1043154.mozfiles.com/files/1043154/zamubiduromil.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/1/0435/0931/7787/files/figutodaxufazepowudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3546/7162/files/gotole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8475/2072/files/79423328233.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0436/1366/files/a_long_way_gone_essay_assignment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2672/2201/files/stealthgenie_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2121/2570/files/fewutedopiwapabenoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0443/6390/files/jump_attack_free.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_off0000a921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA921 5112 bytes
SHA-256: 862c893abeff55cfb72e44826516360463b12423332825102c5c275c6930d1b9
font_01_sfnt_off0000ba8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA8A 10492 bytes
SHA-256: c6bb7a78a76b3c3b687d1cafaede33c6101f93e644388741f72d54289b0b5108