Malicious PDF — malware analysis report

Static analysis result for SHA-256 affb1283e16051fa…

MALICIOUS

PDF

35.1 KB Created: 2020-10-30 21:53:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-18
MD5: 8250a241edb83396778c2c118f86bd75 SHA-1: 9a73a4a39fce781b10ccb09d7c44a8714603963a SHA-256: affb1283e16051fa18362a7b6ce7d5ae901ae8effaac1041b16d5c872b140947
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=solution+manual+of+concepts+of+modern+physics+by+beiser+6th+edition In PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/8598858.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/a75646fe5529.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f86f90a81eaa.pdfIn PDF document text
    • https://mivosubewo.weebly.com/uploads/1/3/1/4/131407796/damozatabases.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f8c4fa3568c9.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/5452898.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/1/0500/0344/3862/files/fufakipifenidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8229/1608/files/purpose_of_summative_assessment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8588/2044/files/the_deed_has_been_done.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1436/4059/files/html_to_web_api_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7462/3928/files/gutizuratoditu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd327ccc-d67d-4baa-91ed-e94e9519f5ed/kotozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7088/0414/files/25028082962.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_off0000488d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x488D 5892 bytes
SHA-256: d6a905759e88ce6c5f93514a62c4654f3e872ae15374686a64dffb893a102938
font_01_sfnt_off00005c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C72 10160 bytes
SHA-256: e39236ec85e0a22adfcc0a9493076c5c6b278aaad3b703d3c8708101a81ede12

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