Malicious PDF — malware analysis report

Static analysis result for SHA-256 6079e48757743be1…

MALICIOUS

PDF

49.1 KB Created: 2020-08-07 15:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6343c28fccf760608b1bbe13d854659 SHA-1: 80657d74f64a78274f06498a2424d993e2924c3e SHA-256: 6079e48757743be1bcd111fcdc9d22f565247302bf103bb7545e08ce418abc0b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final malicious destination. The heuristic PDF_SEO_LINK_FARM indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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://ttraff.com/pify?keyword=bernardo+nante+pdf
    • http://files.shareinhisloveministries.com/uploads/1/3/0/8/130813307/514695.pdf
    • http://files.louisianactf.org/uploads/1/3/1/4/131453907/4ba67.pdf
    • http://files.streetchurchministries.org/uploads/1/3/2/7/132710795/1327261.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/9435/1778/files/mogumuladozupa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/vilagajut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/analytic_geometry_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/60463097093.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7700/files/nuwejad.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/buffettology_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/nemonibujux.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/5577840657.pdf
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/31261649704.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6513/files/da_yoopers_second_week_of_deer_camp.pdf
    • https://cdn.shopify.com/s/files/1/0434/4496/1442/files/campionato_serie_a_2020_19_calendario.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4717/files/lonuzofoxeru.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006516.bin
de6d3b644315a082e42a29ba17778804a927d2e8f602d0cc06f30877b604bae8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6516 4616 bytes
font_01_sfnt_off000074be.bin
16996c81cb121ad6c0ed98a54006996a184cdfe7301f42fa766163b4b9d0b443		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74BE 4056 bytes
font_02_sfnt_off00008440.bin
37add24a802a62927e14fbb39020e007ef019aeceda1498d42bdd8c6b12d5c43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8440 10816 bytes
font_03_sfnt_off0000a903.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA903 4324 bytes

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