Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea6f4820efc51c4…

MALICIOUS

PDF

41.5 KB Created: 2020-10-15 02:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ce1e3e31f4ef90a90888a98e96490e82 SHA-1: 9f460063d7bdb422b6f43b547fa6875f7b4bdbea SHA-256: 3ea6f4820efc51c4a71d6cbe7d6af5fbb064f02e17f3d9dd8c087e357e6c5ace
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gettraff.ru/123?keyword=fast+test+stroke+nice+guidelines In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f8786547b4b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f874b1b5a67b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f877f1fd8374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f873a83686dc.pdfIn PDF document text
    • https://site-1038401.mozfiles.com/files/1038401/96068616756.pdfIn PDF document text
    • https://site-1040682.mozfiles.com/files/1040682/16091707800.pdfIn PDF document text
    • https://site-1042509.mozfiles.com/files/1042509/87845768395.pdfIn PDF document text
    • https://site-1048452.mozfiles.com/files/1048452/kelemuz.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/1/0488/2392/6949/files/rewafalozexubip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8497/0139/files/mafalamakoruzalej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8096/1186/files/virtual_families_full_version_mod_apk_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be0d28e9-1a71-4f6d-8fa5-a76a6a2eb0ee/19991405908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca3b81d2-3793-41e3-a0fb-4286a7acd063/59833663251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3872/2206/files/wabenegapufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/5437/2261/files/poulan_pb195h42lt_parts_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9831/1323/files/46211261491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d58038-ab92-47c8-a51c-3c3f3345ff17/xasuxox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a16081ad-9265-4cf1-9554-7d49a27b8016/fubavobebep.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_off000065bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BF 5128 bytes
SHA-256: 2d4d8847209004728d6d92613f760ad9313b82c35f3f47c3f375e84081528a2b
font_01_sfnt_off0000773e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x773E 9808 bytes
SHA-256: b4cf936a70a32dfe1c43956360224a2c7deb1dbd0bbed111562763a78cf1914d