Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35982a11ac41e39…

MALICIOUS

PDF

35.8 KB Created: 2020-08-26 12:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 38fbda06708bfc50f6e568f9471c226e SHA-1: 0758e3e10e8c20ab5fd60dc0c146b92121c626eb SHA-256: c35982a11ac41e392620705abf34fa74a6e62fb3c8c33fd64c39f6d26153b6f4
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=telecaster+headstock+routing+template In PDF document text
    • http://fopom.bridgeportcf.org/uploads/1/3/1/8/131871787/1802088.pdfIn PDF document text
    • http://files.expressionstea.com/uploads/1/3/0/8/130874370/990be287c.pdfIn PDF document text
    • http://runikat.snugnut.com/uploads/1/3/1/4/131408917/punuzazebitubi-bisetudaxa-viniwif-gilazunapu.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/1/0427/7246/3772/files/english_spanish_idioms_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/gudasoxibaperenafubixinar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9411/3446/files/40122117222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0965/4440/files/boxemov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6871/1321/files/41154927203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/biodata_tagalog_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/nuvij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1647/8110/files/contabilidade_balancete_de_verificao.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_off00004e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E86 5500 bytes
SHA-256: 6c5459b1d2ba073a44145fbd5cff2d63e757df17ad707b88eac6e9b9b830dfba
font_01_sfnt_off00006106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6106 9888 bytes
SHA-256: 882a484491517cc3d002dc41fc74272bbb9c837094bf583a691148a6fba03948