Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac258de8bf68095…

MALICIOUS

PDF

36.8 KB Created: 2020-10-07 22:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f371c2c2c9966d94395422847e49289a SHA-1: e918d3772d0792c9c29ff4f4d5f59f5c8df2d340 SHA-256: 1ac258de8bf680956a0213969216ca9759a1fcddb01f2f36c32dbc8c8e9a68b6
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://gettraff.ru/strik?keyword=udp%253A%252F%252F+tracker.+trackerfix.+com%253A+80%252F+announce In PDF document text
    • http://files.yunkawasiperu.org/uploads/1/3/1/3/131379612/vizarifogumawov.pdfIn PDF document text
    • http://mobanozo.blessedmemphoto.com/uploads/1/3/2/8/132815002/kafaluxipakojokuliso.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/1/0437/0874/3835/files/radio_shack_metal_detector_63-3015_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3397/9811/files/nidaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5880/3100/files/4312978618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7730/7042/files/freedom_apk_info.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/ge_34760_antenna_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7376/3496/files/australian_scout_uniform_badge_placement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9033/7174/files/japudemevowoxexojerede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0829/7630/files/57547613264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3548/3551/files/56682591147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6079/7862/files/savizawifajuxenub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6690/8063/files/nuvole_bianche_piano_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4849/2438/files/1790997205.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_off00004d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D70 5668 bytes
SHA-256: 69e8540636bb9a9d74d77532c8f25394134ab96569619fb30cebce567de4cb7e
font_01_sfnt_off000060c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C6 11840 bytes
SHA-256: 3197153b873e0099389266fb9ca0da17c541f823d9a132e56ad31ee98b0dd936

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