Malicious PDF — malware analysis report

Static analysis result for SHA-256 5947b5b8875bc262…

MALICIOUS

PDF

43.6 KB Created: 2020-08-07 23:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 324656041c02192820a17373f772b58b SHA-1: 33e1587d46554f62c970ee6ac18b2f4cd6467ebb SHA-256: 5947b5b8875bc26230bbd8a93a3aecc3b1932d7629be96c967739078f5ee81a1
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.ru/pify?keyword=crisis+addisoniana+pdf+2020 In PDF document text
    • http://files.languageexchangecenter.com/uploads/1/3/1/1/131163902/8151319.pdfIn PDF document text
    • http://files.dualwayvintage.com/uploads/1/3/1/4/131406785/be1232078b7f97.pdfIn PDF document text
    • http://bomukafux.newkirkbc.org/uploads/1/3/1/4/131438641/9ee7a39c5.pdfIn PDF document text
    • http://files.ragingloveministries.org/uploads/1/3/0/7/130740221/fokixurubadozeti.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/1/0430/3680/3233/files/36133892660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mikawewetekiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2704/6298/files/tugewudaxez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/kametopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/vewemakisizasaxopegofesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/16197098258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/74757461947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6286/1730/files/98141160141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3110/8503/files/journal_pteridophyta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0119/1328/files/93333667214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/borojazegisawatizopez.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_off00005beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEB 3832 bytes
SHA-256: fb348cffab326c20b9a8b858957c69a76c7f813e5667b25b37c8dd4162a2d260
font_01_sfnt_off000069a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A5 5180 bytes
SHA-256: 6f126dedecb476c07e97826078ef103fb1897ab742c856fbd0733cc42f8faf47
font_02_sfnt_off00007b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B50 11712 bytes
SHA-256: f16a5a54f243470de844fbd580f716ac18844c5a293f4b66814734fda29be4a6

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