Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7af326fd4703ad…

MALICIOUS

PDF

47.2 KB Created: 2020-09-26 13:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 399a68b0453de736f59ff6830b263557 SHA-1: 2b442d18e302f40d570a59f41ce75d5521f6e45e SHA-256: 5d7af326fd4703add2d8581e57d849a1b96fa1e97b416a7da2ada0db36f11a59
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/pify?keyword=tv+guide+augusta In PDF document text
    • http://fufudadu.natureandyou.org/uploads/1/3/0/8/130874457/8ab606616d1d.pdfIn PDF document text
    • http://files.cottageglenglimpses.com/uploads/1/3/1/3/131379639/kolinavi.pdfIn PDF document text
    • http://novesega.iolascott.com/uploads/1/3/1/4/131454143/4754947.pdfIn PDF document text
    • http://bukit.jameslewisart.co.uk/uploads/1/3/0/7/130775321/wixivaxesarevim.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/1/0429/8863/4263/files/xeroferapijutatav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5478/3893/files/the_starter_oxford_chinese_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/nys_dmv_test_questions_and_answers_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8515/9843/files/devofoxujadajakixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0157/6602/files/transformations_of_logarithmic_funct.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8778/1276/files/jemezupuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2582/5955/files/dubuzituvevib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7003/6904/files/bank_account_class_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8774/1607/files/advantages_of_artificial_intelligence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/www_languageguide_org_french_vocabulary_fruit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9756/8920/files/40769709937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/limurusase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/7791/0947/files/introduction_to_hospital_management_system_project_report.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_off00007a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6B 4872 bytes
SHA-256: de0af81c03daa91a609da4635b876c5e7271afa8993f4d4f3646b9d34d27fa11
font_01_sfnt_off00008b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1A 10436 bytes
SHA-256: 76a1932b0ffdc655a7f72972db9271eced7540f0fd45d9a95936cba977100f48

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