Malicious PDF — malware analysis report

Static analysis result for SHA-256 618cde2cbf33a619…

MALICIOUS

PDF

79.2 KB Created: 2020-10-18 22:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: fad434e7da907a9a33b2208a38d3044c SHA-1: de797ebf69884443e1265a2df905996866372323 SHA-256: 618cde2cbf33a6198e19fe482ec84ac39b30bb80e1eb27beb7781d4dd49c21be
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/123?keyword=biomedical+instrumentation+technology+and+applications+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381081/normal_5f8bd59720360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f8b97af7a043.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/1/0397/9332/8315/files/graal_online_classic_apk_day.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7003/6412/files/uhlsport_goalkeeper_pants_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7484/5375/files/multiplication_strategies_with_multiples_of_10_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8309/3910/files/es_file_explorer_apk_uptodown_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dfff4cb-08a3-47a4-80ea-99a7cfb1a4fc/49181239535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c802f7fd-a369-4c41-97f8-634e3b60b275/4224446008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0187f91-44f2-4431-bfd6-efaeb2c2cc4c/rejavugurubola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47dfac17-e33e-4e71-818f-f128c556a076/nunisasaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82e2e036-7588-4f2e-a76b-7ab0449a84ac/55473369423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d3d23c4-8ea4-4446-86c1-2fee5f563b97/selupuxedajofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e62726a-2b3b-45d1-8885-7824659a980b/47593281683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7af4210-6a85-4a9a-8f06-707f6d554a1b/sezepesiwelaranevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b3b08e3-8d84-4f2b-b89d-265a739ae368/luvubizuwizovenorix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6444/2521/files/50874273382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9795/4743/files/brian_free_and_assurance_members.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1673/0799/files/borabutimotumibasimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6249/2324/files/functionalist_perspective_in_sociology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1973/0583/files/47278202235.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_off0000ecd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD8 5720 bytes
SHA-256: 4d2c613c3ac6f3306320518ff575a4584331cbd7ac775d177aa74a3d9da9bd11
font_01_sfnt_off00010022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10022 15176 bytes
SHA-256: fae11f7bee111fe4941ffd4b0e9982c2bb654cc2b2f539277c1186c453de6459

Open this report in the interactive analyzer, or submit your own file for analysis.