Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71172fae9a764df…

MALICIOUS

PDF

36.2 KB Created: 2020-10-27 17:34:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d7298cc4d4f820b73d5ad9924ab7ea34 SHA-1: 2d077a4cc971e9b881d270f12d79b76803bc548e SHA-256: d71172fae9a764df985626dc05f92349f3d490d11c702d3e963be64466982f0c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary lure URL, 'https://gettraff.ru/strik?keyword=christlike+attributes+video', is flagged as malicious and used in an SEO-based phishing attempt. While no scripts were explicitly extracted, the PDF structure and the nature of the links suggest an attempt to redirect the user to a malicious site, likely for phishing or to download a second-stage payload.

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/strik?keyword=christlike+attributes+video In PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/tigosorivibisakoxu.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/1045037.pdfIn PDF document text
    • https://zemodeviwiteg.weebly.com/uploads/1/3/4/3/134351550/b50c5.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/gofefuvagap.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/88c0b126d823b.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/1/0496/4719/0169/files/option_volatility_and_pricing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/82808397302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9420/3806/files/bapiza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1503/9908/files/14120889329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8068/8836/files/derawulujivumuvugevobak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55356a6b-436f-492a-9ca8-6593e6a823ba/kisirawiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d600134-2987-497e-84a1-b1c6148be919/thomas_calculus_early_transcendentals_12th_edition_slader.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/anosmia_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/xuwaxokodogibusu.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/durotivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1140/5981/files/benuwodufesomumonimaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9328/5792/files/48312623946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2697/2825/files/62194035684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0095/7608/files/mobogenie_indir_apk_76.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc15c7d9-8217-490b-874a-1586c75b2e70/tuvanososokajosukij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c15d6ad-9770-4fa9-894a-9e60b0d61acd/remisepedavofonorafebex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9997812c-0609-4631-bfc8-d358b5890cee/first_conditional_exercises_advanced_level.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecf586ea-bb31-45f6-830c-cf6cb51d9aff/miwatujaginixudijurad.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_off00004fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE5 5084 bytes
SHA-256: dfbe3bb672d656237da39a6f7e86150c65e83834d7dc0af7e8f2f4ab11f9b250
font_01_sfnt_off0000611f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611F 10060 bytes
SHA-256: 34e0d9f75c904ae9b2113cf5abe08a69ecab154459869fea4b67575bdde71e54