Malicious PDF — malware analysis report

Static analysis result for SHA-256 204c667f5eb2e782…

MALICIOUS

PDF

35.6 KB Created: 2020-10-09 12:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4373d58fddcfb4f664d9aaeefda3cf31 SHA-1: a5adc5ca07505b42868716c67aa79c883153e7df SHA-256: 204c667f5eb2e7827ddcb6390e8a72f1fd3010247bbb9af02a3b12af83161626
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.me/pify?keyword=hot+cross+bun+hair In PDF document text
    • https://site-1036993.mozfiles.com/files/1036993/66855189418.pdfIn PDF document text
    • https://site-1040504.mozfiles.com/files/1040504/7045297369.pdfIn PDF document text
    • https://site-1036735.mozfiles.com/files/1036735/mekazep.pdfIn PDF document text
    • https://site-1036734.mozfiles.com/files/1036734/83674200055.pdfIn PDF document text
    • https://site-1042446.mozfiles.com/files/1042446/punitalavuduvevit.pdfIn PDF document text
    • http://files.lisabrack.com/uploads/1/3/2/7/132740586/186195.pdfIn PDF document text
    • http://files.tangofever.net/uploads/1/3/1/1/131164129/fapukusoki.pdfIn PDF document text
    • http://files.littleladyo.com/uploads/1/3/0/9/130969004/furopigolijur.pdfIn PDF document text
    • http://files.louisecandlish.com/uploads/1/3/1/6/131637352/wawidozukovup_noluremulaj_danerozosul_pinuxineromiduj.pdfIn PDF document text
    • http://files.adaofny.com/uploads/1/3/1/1/131164023/6838460.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/1/0483/6759/9767/files/board_games_black_friday_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0952/7967/files/litefipurijina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8581/5190/files/lower_south_cave_ark.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5393/6540/files/56198977325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7397/8011/files/panasonic_inverter_microwave_manual_child_lock.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_off0000505d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x505D 4956 bytes
SHA-256: 1e216f5c6120493e215ca385374325b55f8eb1aa1147e37a38dbb6a22f0a2e71
font_01_sfnt_off0000612b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612B 9444 bytes
SHA-256: 38fc59e3d8eb7b2054329cc403c03aa50969e52fa701216f21f3f9057e892c7c

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