Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc87ea5b19e00a00…

MALICIOUS

PDF

41.8 KB Created: 2020-09-19 09:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 36f04ef7af45e49f8a67a751badfbe04 SHA-1: 63b36d54a14d08e69143d7b9963d9dad94e644a5 SHA-256: bc87ea5b19e00a006b2bd0d925a50fd09b8ea2f08f7974d86af1700312366c84
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.me/wix?keyword=discount+pools+direct+financing In 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/1/0437/7267/4209/files/faboworuvorazawadenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/fuller_house_tv_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9990/5429/files/56728720182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/netozijavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/fusoniponitorodudefig.pdfIn PDF document text
    • https://477c3356-7a87-4cdd-be0d-f55aeed4f3bd.filesusr.com/ugd/9904c2_2ef32d273e2943ddbdeaf715beca992c.pdf?index=trueIn PDF document text
    • https://174823e7-2d62-43a7-804b-98fd52267ebc.filesusr.com/ugd/b0cb2d_0532994248a24826a6d6a596df5b3917.pdf?index=trueIn PDF document text
    • https://7282678f-3f85-4aea-b83a-7161685e0c0b.filesusr.com/ugd/4fb05f_1674a7045c124fd689e35c558fdbf04b.pdf?index=trueIn PDF document text
    • https://2301ac89-1a3a-4baa-b3fe-560437740b9f.filesusr.com/ugd/66c878_caba4e25e29b40c3a7df1b0201820a84.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8828/8413/files/reading_comprehension_worksheets_6th_grade_printable_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/40913229448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/45_55_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9585/4997/files/din_pro_font.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/84549460607.pdfIn PDF document text
    • https://99979d18-017a-4012-a769-bf388da4b38d.filesusr.com/ugd/c7ef1a_1c2680123fe84bf9b0991432a78343dd.pdf?index=trueIn PDF document text
    • https://dfa96a8d-6bfa-4aaa-86f1-74102ef103eb.filesusr.com/ugd/bc4951_532cd91410154f1f981b8547f17a0d40.pdf?index=trueIn 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_off00006383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6383 5320 bytes
SHA-256: 18e3e40517cbe614794cc2a045543576b318579baa28e78c1cc051d022a0e047
font_01_sfnt_off000075b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B3 10816 bytes
SHA-256: dde8aeeed704ad79e2b1b0ffce9f05bcd6d2b0903dc69b2719e9ed9854b96693

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