Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3bad91bd4c9ad1…

MALICIOUS

PDF

46.7 KB Created: 2020-08-12 01:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 658c154a4e9276e53393f7d67e8adecf SHA-1: 26145b9d907f16c35d48c14582660a6685534ff1 SHA-256: 1b3bad91bd4c9ad11bc9220668fca00c44797155792fc8bd7af546be756de15e
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.ru/pify?keyword=bijoux+victoria+catalogue+pdf In PDF document text
    • http://files.neurodiversetalk.com/uploads/1/3/1/6/131637325/gemow_depukezabemona.pdfIn PDF document text
    • http://files.willhutchinsonart.com/uploads/1/3/0/7/130739490/fukujezepavemu.pdfIn PDF document text
    • http://boxij.jewellhjohnson.com/uploads/1/3/0/8/130813834/6551294.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/1/0431/3425/5258/files/performance_appraisal_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/faluna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7559/9524/files/97938975522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/bufefuzowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/when_i_am_laid_in_earth_henry_purcell.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/fawilobufud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2962/files/54745674456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/xikav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/germany_time_zone_to_pst.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0239/5798/files/kabozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6795/5610/files/97467906727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/antibiotic_resistance_statistics.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_off00007831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7831 5396 bytes
SHA-256: 2a0cc32e10d55abf7ebc130d7a48eb24282f4b209939200f075e580950373500
font_01_sfnt_off00008aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAD 10412 bytes
SHA-256: 90a6980c1daf123fe387065ddd0d31efb5ee7dfd90df14594b757e989d842dd7

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