Malicious PDF — malware analysis report

Static analysis result for SHA-256 4628c074f9ddbd95…

MALICIOUS

PDF

43.6 KB Created: 2020-10-28 03:46:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: da6e0182ab276f8dcec995c8749c03b0 SHA-1: c72fb9d40a8aaea97624a14e8095739171cb2b8d SHA-256: 4628c074f9ddbd95d814e37954f16b9820ef2eb236450c679f4caea67617a845
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.link/123?keyword=kfc+corporate+office+california In PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/varuxavir_betux_fekaponinetase.pdfIn PDF document text
    • https://durewisopugus.weebly.com/uploads/1/3/4/3/134369166/f75af03e3cc4067.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/2855382.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/wapewaka.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/vuxubofowa.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/rozebejakoraxema.pdfIn PDF document text
    • https://ponopuxebi.weebly.com/uploads/1/3/4/3/134365602/df8793813.pdfIn PDF document text
    • https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/wafera.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006b53.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006b53.bin)
    • https://uploads.strikinglycdn.com/files/89b257c7-6092-4a98-a248-4d4368b5aa7f/oak_furniture_warehouse_chippenham.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ebd8d10-1d75-43f6-85dd-4f9fa3cf2dac/el_arte_de_no_amargarse_la_vida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/738851b4-64c6-4b57-9ea2-47848349da24/29663481998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3841/1422/files/cuisinart_hand_blender.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8720/9670/files/fisdap_unit_exam_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3897/3345/files/88459264473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2774/0827/files/varifebojegipebikusaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2148/3687/files/kia_soul_spare_tire_kit_2013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4333/2000/files/british_english_and_american_english_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8541/2546/files/vuwejerizetimutinuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8898/4222/files/wealth_x_report_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/excel_vba_print_range.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8faa8ca5-d339-4b2f-bb83-846693c76ce3/ikea_hemnes_tv_stand_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a60daa5c-deae-45b3-aab2-4e236769467e/vuluruke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11b2df20-a09e-46da-900d-1590cd54320d/94078044134.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 extracted file (font_00_sfnt_off00006b53.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B53 4800 bytes
SHA-256: 542d34cbf248fc72b8e3e01b770acd0ed0acc21c8f05033b10107ceeb8514771
font_01_sfnt_off00007bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB2 11008 bytes
SHA-256: 23a7f406c0a29491778cc5145fb626b0dba8da589bedb24458b3dfd6ad03c7de