Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d87ff54c5f4882…

MALICIOUS

PDF

40.7 KB Created: 2020-10-08 18:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8671e0c6cb292135a5ae4f4bf2ff4882 SHA-1: 3bc8c298b8b92a6461d3ac517cc3bd7a6b01f8f5 SHA-256: 16d87ff54c5f48827f72dea272e99fb7848e9a61a38898b2048854c7cd2f0401
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.cc/pify?keyword=lsu+chemical+engineering+flowchart In PDF document text
    • http://files.pentepoets.com/uploads/1/3/0/7/130738704/f3559c3654f95.pdfIn PDF document text
    • http://files.dustinvillarreal.com/uploads/1/3/0/7/130739094/5358125.pdfIn PDF document text
    • http://migux.eastmoreland100.com/uploads/1/3/1/6/131606113/wadabadu.pdfIn PDF document text
    • http://files.eguastella.com/uploads/1/3/1/8/131871690/4656610.pdfIn PDF document text
    • http://ririd.drchristinebacon.com/uploads/1/3/1/6/131606923/vuzozu.pdfIn PDF document text
    • http://files.cheapautoglassinlasvegasnv.com/uploads/1/3/1/3/131382470/zekojoluvi_kidizoxigidu_zanuloju_lavijubaxizuto.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/1/0481/3963/2803/files/doodle_army_2_mini_militia_hack_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/2131/2671/files/xuliwuwukunaxaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1849/2325/files/90631556861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2873/6918/files/72395492935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1873/8600/files/55589119938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3241/0272/files/craftsman_resin_storage_building.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9238/8261/files/borderlands_2_gunzerker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5541/8017/files/catching_fire_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9347/3445/files/76718482705.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_off000062c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C4 5328 bytes
SHA-256: 0f27ca9dc0af098ebe6585e8d720f216706f02c0d6608e2c7454b21037a438fe
font_01_sfnt_off000074c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C8 9672 bytes
SHA-256: 33e8612704f7cb592abff14466cbb0870646f2005a01d4867945f39a6237a62f

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