Malicious PDF — malware analysis report

Static analysis result for SHA-256 b552b9bedb13677e…

MALICIOUS

PDF

47.3 KB Created: 2020-08-28 17:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 234c3908f947cf067addff2fdba6cd46 SHA-1: d3a7387a68e11735014d92e016908993bd4e9c7d SHA-256: b552b9bedb13677e592479890ac3e3e1e37734d3278867a63e3df7888508eb3b
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.link/pify?keyword=textos+argumentativos+ejemplos+resueltos In PDF document text
    • http://bewixe.inclusiveplaygrounds.net/uploads/1/3/2/3/132303382/3173865.pdfIn PDF document text
    • http://files.lulabellestyle.com/uploads/1/3/0/8/130813548/jufezekuz.pdfIn PDF document text
    • http://wigara.taylorbarrettphotography.com/uploads/1/3/1/8/131871655/webixot_judirito_wipugivomikok.pdfIn PDF document text
    • http://bexojunar.irishglassartist.com/uploads/1/3/1/1/131163667/1915264.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/1/0432/9370/4356/files/17220141480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/94684824364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/jikiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1862/2875/files/mcgraw_hill_connect_microeconomics_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/gidijajazagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/clinical_biochemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0393/4877/files/1439341240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/wayfair_furniture_locations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/raxorajovovuvok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9937/4233/files/51761858326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/duselorawovezakon.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_off00007676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7676 5292 bytes
SHA-256: a36fcbcb39712e5c4b4c3e7ecd27016017eb71ef8684d185e6e286ee934c2314
font_01_sfnt_off00008870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8870 11720 bytes
SHA-256: caef88cea471c37dbf7595b2c3600d3afb380aa463ccc26d3b4d3aec5777ac9c

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