Malicious PDF — malware analysis report

Static analysis result for SHA-256 f95ca637b62504ae…

MALICIOUS

PDF

40.5 KB Created: 2020-08-11 16:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8223a504d1b70aa488db5baa6bc70f15 SHA-1: 619a33c4cf2b221fabdcc88820860e1a6da31833 SHA-256: f95ca637b62504ae1edd1be1dcf3214d3ce69ad10e7678210dded6a1e07fddbd
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=goals+and+applications+of+computer+networks+pdf In PDF document text
    • http://files.shamanushibas.com/uploads/1/3/0/8/130873769/bapipemutebilaju.pdfIn PDF document text
    • http://files.hederafibers.com/uploads/1/3/1/8/131872273/f39cec726998.pdfIn PDF document text
    • http://files.hightopconsulting.com/uploads/1/3/1/3/131383934/diwozofeze_kituxor.pdfIn PDF document text
    • http://files.francisfamilyblog.com/uploads/1/3/0/7/130776370/9688007.pdfIn PDF document text
    • http://files.faceinthesunlight.org/uploads/1/3/0/7/130776249/pabaj.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/1/0431/1747/8044/files/93532651546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53975554289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1384/8733/files/how_to_backup_bookmarks_in_chrome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/74780386661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/zowek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/11832531770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5671/6183/files/further_pure_maths_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/5065690807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1167/8114/files/suzukagejukobaxirutixasiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6133/7494/files/sabobaxubopoberaduke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/black_and_white_converter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wowivitotorinu.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_off00005ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFD 5488 bytes
SHA-256: 460d74ae98b7df7456fe1fa87c21a54a90cb24d630b2c2c44a91659277bcd49d
font_01_sfnt_off000072a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A2 10052 bytes
SHA-256: 68d18d656aebedb4a91fc66c2fbd52831406f8b9e3662b8669de69c5c7765778

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