Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7cec39ee377e185…

MALICIOUS

PDF

46.5 KB Created: 2020-09-27 00:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f15b63ea097de0c4bfdaddf853f21569 SHA-1: 271f7b4ab5c4f03e7b223b2dfcb3f94aa7557ed6 SHA-256: e7cec39ee377e1851fb7045cb62b5defebf41a3d05b3c099f500213cbc1c3a95
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=ps3+jailbreak+download+multiman+4.80 In PDF document text
    • http://jases.sarahbovy.com/uploads/1/3/1/4/131437919/bc5f793611.pdfIn PDF document text
    • http://files.pacni.org/uploads/1/3/1/4/131407406/teritazefotewabubo.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/1/0435/9664/4511/files/nuwidujaxowibokanenuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5733/9813/files/47293177222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4768/8091/files/gabriel_s_oboe_sheet_music_guitar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4693/5447/files/jedopexip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5824/0407/files/android_auto_head_unit_toyota_tacoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/jemena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0292/1123/files/91513974898.pdfIn PDF document text
    • https://a700d592-ad1f-4a18-9af0-69684e0e7cbf.filesusr.com/ugd/23b571_bb47df72b0fa428a87bd884a197e89a9.pdf?index=trueIn PDF document text
    • https://d136b94d-f075-4f1f-816b-b0219e782c25.filesusr.com/ugd/197ed4_61cf6aa04c4e4810a55b031f0bf51530.pdf?index=trueIn 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_off00006959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6959 5964 bytes
SHA-256: 870f08ef44c0929f430dda317661d7d41592062ccc102fa5b9879a07d0e8ba11
font_01_sfnt_off00007da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA7 15296 bytes
SHA-256: 987f460f611cf2d627b712db10986c464631429c8110151ece6fff53c063f582