Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba9aec149c76765…

MALICIOUS

PDF

50.4 KB Created: 2020-08-24 05:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cd6ede04c63851f31c0599f1e0849a81 SHA-1: 67a2a2188f578e33e233770738782947733184f5 SHA-256: 6ba9aec149c76765a927b67cd11daf79e42649e5e09a08483a1905d7b1a30fcb
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.com/pify?keyword=bang+bang+movie+free++mp4 In PDF document text
    • http://files.positivebirthlbc.co.uk/uploads/1/3/0/8/130815303/vuzurujo.pdfIn PDF document text
    • http://bigubad.pamswaycreations.com/uploads/1/3/2/6/132695832/potima_wuxotov.pdfIn PDF document text
    • http://files.lscarpentry.com/uploads/1/3/1/1/131164250/7935492.pdfIn PDF document text
    • http://ridifir.loveadelyn.com/uploads/1/3/0/9/130969525/5402300.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/1/0427/4615/1078/files/59945652894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/39837693850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14192803693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/soil_slope_stability.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/bilisake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/xujugofalogofiwivaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/modern_probability_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/81993609151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2147/4714/files/fibalazadedefisofe.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00009989.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9989 20828 bytes
SHA-256: e3d5f2d27ea9dedd64bc958aed07384fd34ab0397115e8470cbeca9820b94980
font_00_sfnt_off0000566f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x566F 3240 bytes
SHA-256: 7cba628533125193f5af5b9e52b18f844190d3469c3d8a5e22a6f0c278c57347
font_01_sfnt_off0000621b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621B 5348 bytes
SHA-256: c14171b3e48ad3d03ccedccd63734ab98f10073e9b1b966c5f5ff6a2c49a60b7
font_02_sfnt_off00007447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7447 11388 bytes
SHA-256: d91b9b8c3aee9aa6e2da80189e0c6ccbffc7154aecf503f07836bb566fafea6f

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