Malicious PDF — malware analysis report

Static analysis result for SHA-256 0782b0cf252ef5de…

MALICIOUS

PDF

47.8 KB Created: 2020-10-30 10:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a7b0118ada3c5f178696e847fe22529c SHA-1: 3f616e632bf3f360aa3b32e86d45bbe68e903b24 SHA-256: 0782b0cf252ef5deced3882ad434236c7092761c9bbed671f1b95c7c485dc81e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to redirector infrastructure. The primary redirector URL, 'https://ggtraff.ru/strik?keyword=a+raisin+in+the+sun+mla+works+cited', is associated with malicious activity. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting a link farm or phishing lure designed to redirect users to potentially harmful content.

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://ggtraff.ru/strik?keyword=a+raisin+in+the+sun+mla+works+cited In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/xududev-ledavodu-jatulivarolaxe-bixebenal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_5f8d02f2888b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390373/normal_5f93e1aac1d31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401538/normal_5f90b6a62cbb0.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/segifelesilokunuva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5f978e377b7d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/60830ae7-aefb-44ce-b21c-3888ec5dd18f/zazipazivikadotibapepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4551aa9c-1add-4722-b99a-c0cc4d000b34/fazopuperujetesenaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3739/1531/files/togimarimel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6af4dc01-88c5-4e14-b7c5-1487c6aae4a1/87129492584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5479/1846/files/xafazol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/320aca74-37ca-47ca-8590-4d139a1009c1/73869873829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1296/3482/files/67608560432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5354/5632/files/bobovidutakodojunuguneb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dae7ad1-3598-474b-a7a2-4744c9bc35e7/12843076437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2939827d-deda-440b-9fde-2f64b6def067/14316164280.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C3 2900 bytes
SHA-256: a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a
font_01_sfnt_off00006f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F05 5324 bytes
SHA-256: 5adf4c48a05d1dbfd890f9404b874134485aab0af7af5f52b2da8bfb50707289
font_02_sfnt_off000080f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F9 2920 bytes
SHA-256: 0b0b60f7ee493458466d2ab00f2b6d7b9e57c8a987d59773a0935645a7777da7
font_03_sfnt_off00008c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8D 10832 bytes
SHA-256: ad50a9eed77bde58b967e64d0d1f6ce397e47a8eeef36cf21e9cbf170f74ffa4