Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6fc18f274e97663…

MALICIOUS

PDF

43.0 KB Created: 2020-11-04 10:32:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e0f680dd1d3b1a3ec69e383b5a6561ac SHA-1: 612003b266823a455bee2438ea602ab3fafe733a SHA-256: b6fc18f274e976636c50661e9107d6daf7c652388f0f9d5700e3d056be98ba10
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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/123?keyword=spotify+music+offline+on+apple+watch In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_5f9d5a634813a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f9a69771e9d0.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/fuzofodugusivunosit.pdfIn PDF document text
    • https://gokipeko.weebly.com/uploads/1/3/4/3/134351508/5948983.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/nobel_xokatetuzotew_bojiparelemoki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/27151335623.pdfIn PDF document text
    • https://s3.amazonaws.com/juxatop/35400909236.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/48709589799.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/argumentative_essay_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/ignition_control_module_location.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/game_of_thrones_pool_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b7a9bf4-897a-424c-b714-611532e86528/tomakinuxagedasevagekub.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_off00006930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6930 5456 bytes
SHA-256: 071b2627876ab94cdcf06ca2242cdfb5e7968a9808b5af95cb4c8dfec488d495
font_01_sfnt_off00007bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB9 10576 bytes
SHA-256: 16b74c9de8fb6c4886eb80d3a310124a3cd4ae9b8eccd7e71908c0267f55a0b6