Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce134124342e6f47…

MALICIOUS

PDF

44.0 KB Created: 2020-10-06 10:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: abc46e31a522b391724b46793f85a874 SHA-1: 5c7ab99e55956a8f599b4b16fe2d7ddb44dedb3d SHA-256: ce134124342e6f476c0184032a4223127aad05dde0a8ddc0a97ff1786eb0c6a6
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=sacramento+business+license+renewal In PDF document text
    • http://files.yscenterforteaching.org/uploads/1/3/2/6/132683062/3277187.pdfIn PDF document text
    • http://files.degraffumc.org/uploads/1/3/1/4/131409098/xokokolo_ruxikofo_texube.pdfIn PDF document text
    • http://files.mimisclothier.com/uploads/1/3/0/7/130740551/riwafazali_wewevegigazazo.pdfIn PDF document text
    • https://site-1041074.mozfiles.com/files/1041074/53738186910.pdfIn PDF document text
    • https://site-1042938.mozfiles.com/files/1042938/67746716655.pdfIn PDF document text
    • https://site-1039779.mozfiles.com/files/1039779/84506203246.pdfIn PDF document text
    • https://site-1039749.mozfiles.com/files/1039749/19939675227.pdfIn PDF document text
    • https://site-1043941.mozfiles.com/files/1043941/78789469476.pdfIn PDF document text
    • http://xoxuga.techsolcongrp.com/uploads/1/3/1/4/131438641/nuwad_pugagowipika_garezaso_bulojuxibemebe.pdfIn PDF document text
    • http://files.ivmana.org/uploads/1/3/1/6/131636644/vinoxuzitusubi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6559/7342/files/wavewatof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/kelowigof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/1367/0565/files/vofiragirofuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0929/7560/files/zisegunezibitowuwimerige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5097/1548/files/edison_high_school_fresno.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6039 5160 bytes
SHA-256: bd2ca235f9c3ef95e0b1d13ade14e68153ce1c6c736398521cee81461938906a
font_01_sfnt_off000071a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A9 10444 bytes
SHA-256: 96aa65574da54b8e4fda7e0ec5b3c00c99a7f15d269503df0938f122f0a6aeed
font_02_sfnt_off0000950f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x950F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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