Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d826f3e1c3ed73…

MALICIOUS

PDF

51.1 KB Created: 2020-08-14 12:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 898ef4b19633796087a3509b87e72316 SHA-1: b64e3f65dff06bf4f8982df656a4b4f63340efff SHA-256: d1d826f3e1c3ed732430f004099641c10a377843d20ca3758b51329ae937ede8
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.cc/pify?keyword=microsoft+access+2013+free++32+bit In PDF document text
    • http://sujuxozo.cruiseandtourexperts.com/uploads/1/3/2/7/132740541/8419194.pdfIn PDF document text
    • http://files.goodcompanytutorials.org/uploads/1/3/1/0/131070904/1912244.pdfIn PDF document text
    • http://todiwo.petradenison.net/uploads/1/3/0/7/130738732/wilodapewo.pdfIn PDF document text
    • http://files.precisionskitune.com/uploads/1/3/0/8/130874031/1604426.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/1/0431/5004/9448/files/46860028747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5289/1297/files/94271530174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4418/3974/files/25238410224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3708/8154/files/accounting_information_systems_romney_13th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/bufigojivepevomefirepipem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/complete_spring_framework_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/23408131990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/12017249158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/basic_quantitative_aptitude_questions_and_answers_with_explanation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/62013974220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2521/0276/files/bwv_974_guitar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/9323/2535/files/counter_uav.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_off00008a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7C 5480 bytes
SHA-256: c58d1bdbca2d511b1dc2c1e2bda0a0241fc8be5fce4e077863734cd912999f1f
font_01_sfnt_off00009d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D2E 10044 bytes
SHA-256: ea7b3df8e1a22f832e895914e92f2c79a4e73de9a94298195f07277ee31b0a08

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