Malicious PDF — malware analysis report

Static analysis result for SHA-256 7998c47cd8ba88dc…

MALICIOUS

PDF

48.2 KB Created: 2020-10-31 20:23:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1d14ee30e23b4616d530a1799ba71fff SHA-1: 159c2043439966a0ed7f611ea227e85b6707e9ed SHA-256: 7998c47cd8ba88dcbb39cac0adc597fa1e0a506b6ce96a6f5fb641fb9b75e2e2
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=neverwinter+professions+guide+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408987/normal_5f961d9bb8256.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/b1bb92aa4.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/87313b0f4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6087/7224/files/79012729396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5108/0087/files/krwg_tv_schedule_las_cruces.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/969aaf7e-93a0-4e98-8bf3-a31e9548471d/50653545663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5060/4988/files/girusezutofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/best_cheap_android_smartwatch_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3631/8140/files/72501190748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0332/8673/files/this_pretty_planet_spinning_through_space_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8209/7834/files/energia_anaerobica_y_aerobica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6789/0069/files/16593270098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8895/1451/files/97275113112.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E78 5084 bytes
SHA-256: 1cd3b2347de2859fe5e1f10b48aae6175912470e30bbeed9f1ea798ec7d37d30
font_01_sfnt_off00007ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF3 11048 bytes
SHA-256: 8014f4acf9fa6bd4632a64e9d985837bec267858d0822a6d5e223b47abcaa295
font_02_sfnt_off0000a57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA57B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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