Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2f85bf61e62f38…

MALICIOUS

PDF

35.9 KB Created: 2020-08-18 18:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d044ff3d72a7cd0be8f715499fb2378a SHA-1: 8b37687daf6a0e1b4f8674193400b72184a04a98 SHA-256: cc2f85bf61e62f38a5670bcb38d06afddbb5c3c225442815ad2276e9babd0772
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=lux+aeterna+piano+sheets In PDF document text
    • http://files.geologicalsocietyct.org/uploads/1/3/0/9/130969220/xediwur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3842/3710/files/buku_identifikasi_gastropoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75278808376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8520/9507/files/windows_7_aggiornamenti_0.pdfIn PDF document text
    • http://geviwof.my-site-104479-105935.square.site/uploads/1/3/1/4/131453060/gipazemuz_tukazeta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1307/0238/files/19859857528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3505/5512/files/able2extract_converter_premium_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3119/8886/files/75985871183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0633/6925/files/wunisutoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/sakejogunirixivagilun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7749/1093/files/belt_conveyor_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/english_grammar_correction_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/achyutam_keshavam_lyrics_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/vopajowenaduvuzikasonaga.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_off00004353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4353 4764 bytes
SHA-256: 5728b6bfde5546455996ba6304d6fafc734efef54abb16dd80fdbbaff5ec990c
font_01_sfnt_off00005376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5376 9712 bytes
SHA-256: 92ea62e680af3a96865f1d5fece1351e38329ebb8386de83ba5f397c4bb7c1fa
font_02_sfnt_off000074a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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