Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d6d3aa80d080d8…

MALICIOUS

PDF

43.8 KB Created: 2020-10-14 17:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: b41484bbb057d45b3bdf0cf614096013 SHA-1: e4b5b00bc679b34542ef4396f3e889eaac51990d SHA-256: a8d6d3aa80d080d8c3d83e776dcf76aa00602435d1496f68cfeb77dc0f3f106c
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://gettraff.ru/pify?keyword=bls+2020+book+pdf In PDF document text
    • https://site-1038422.mozfiles.com/files/1038422/69245082146.pdfIn PDF document text
    • https://site-1042287.mozfiles.com/files/1042287/66608505500.pdfIn PDF document text
    • https://site-1040764.mozfiles.com/files/1040764/62150651456.pdfIn PDF document text
    • https://site-1036957.mozfiles.com/files/1036957/81964958373.pdfIn PDF document text
    • https://site-1044239.mozfiles.com/files/1044239/talimexiw.pdfIn PDF document text
    • https://site-1038489.mozfiles.com/files/1038489/karubam.pdfIn PDF document text
    • https://site-1042922.mozfiles.com/files/1042922/75282508709.pdfIn PDF document text
    • https://site-1039875.mozfiles.com/files/1039875/rupitaboreparatukexuf.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/3373854.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/debizikirapanas.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7904132.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/1/0491/7094/0070/files/bobiwubogazona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6173/4293/files/84292809012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9448/2330/files/work_energy_practice_problems_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7093/7495/files/22919292364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5700/7770/files/77656179597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a96b2f73-eab6-4aad-acba-e9ce44041a97/40354710095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/004b2371-f948-4040-9e80-d9962b0b2514/93094854631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbfd9a4f-924a-418e-809e-e79f301dc5bf/luwofovebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae53c59-0b28-470e-acf7-73fd8c53e284/84985639476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0e6980-c5cf-40c2-9a01-bfbeda423979/86122010153.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B4 5256 bytes
SHA-256: 0486565cd8cd3d25135cdf0cf82414d1343fbf94aa2ad6dd0ddaa32c7ea69341
font_01_sfnt_off000073a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A3 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00007c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C31 11756 bytes
SHA-256: 892b5cef956606d59bd923c7e976d1afb512fa105d8879cc36b7b3f8d18f6c0f

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