Malicious PDF — malware analysis report

Static analysis result for SHA-256 848caf40bd2eb389…

MALICIOUS

PDF

34.6 KB Created: 2020-08-18 14:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8257b6c20f6413e5585587393173d801 SHA-1: 3a207c9d2f5a18dfc7329f45921cceae62c41b74 SHA-256: 848caf40bd2eb3891af4e852f756f0116a6ad8f712ba950938608d1b30c5f05a
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=bad+company+full+movie+free In PDF document text
    • http://toforelu.catholicartistconnection.com/uploads/1/3/1/6/131636612/9087441.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/1/0434/0659/0106/files/97798700340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/42596724505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/siemens_afdd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/editorial_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8130/9083/files/47541874349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5913/5132/files/singer_66-_16.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5780/6488/files/dubatijatibabexituzex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4809/2327/files/zurenidirudoxupana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0581/2633/files/jutesosegufusimuzuxivigij.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_off000047a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47A3 5336 bytes
SHA-256: 2a6a2f46462d26776a82517c747cc00e477480cb7976f59ab0d30c56d100604c
font_01_sfnt_off000059bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59BF 10716 bytes
SHA-256: 25df80853cc8b2383113815c7629078224753dc5541669acf728533bb74d192b