Malicious PDF — malware analysis report

Static analysis result for SHA-256 878f870f8b76e7b5…

MALICIOUS

PDF

35.3 KB Created: 2020-10-11 06:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0299a982ec7073482a2c9da9ae5bc31f SHA-1: e9843de24f20ba78a2edb9bfe59e854b6377a2d1 SHA-256: 878f870f8b76e7b506084cd91103445be71ae551c8b2e6c2e85a0240d830c22a
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/strik?keyword=genki+1+textbook+pdf In PDF document text
    • http://dugadegi.tarotcrossroads.com/uploads/1/3/1/8/131871488/8579482.pdfIn PDF document text
    • http://files.cherokeecountydemocraticparty.com/uploads/1/3/2/6/132682042/1440192.pdfIn PDF document text
    • http://jinebuxu.alejandrosmexicanrestaurant.com/uploads/1/3/1/6/131636612/pukikavoroginelatexe.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/1/0497/7813/1095/files/auto-installer_deluxe_v4.53.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/nimixiger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1223/5159/files/city_of_garland_recycling_schedule_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2447/2471/files/abstract_nouns_worksheet_3rd_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5868/3291/files/riporobozobofurorokujaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a213ff1f-b968-4f64-8638-1fd63a500183/30929997477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b70d1e-9b0b-4ce0-a564-8a6ca48a2c9f/dizoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2618/5891/files/bozemumubekipexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6905/3854/files/characteristics_of_life_worksheet_answer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3902/0950/files/78672786899.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_off000044a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44A9 2952 bytes
SHA-256: cb9072f881c1fe0ad8900bbcc5a20a23fabb306412f64e001cac76c2a9509f2c
font_01_sfnt_off00004f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F38 4872 bytes
SHA-256: 012b555a507bfba0e4b9fcdef151ba6150476068beed6885226961e9de99fdb5
font_02_sfnt_off00005fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEF 9504 bytes
SHA-256: bec3fca2e2ecb8d607cdaa27de13c150b57b7ce0ca5c6612156f2d77490facd9

Open this report in the interactive analyzer, or submit your own file for analysis.