Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bfb43fd4ea4fed9…

MALICIOUS

PDF

35.5 KB Created: 2020-11-01 07:12:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7d6318da534a43eb626ce97bb08b3b5b SHA-1: ff259804f99ade84ce70b10025f3d938a364007f SHA-256: 5bfb43fd4ea4fed92ea530a69ec2a63f6ab0f59839e2ffddcd0498af419b3d75
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.club/123?keyword=rand+mcnally+road+atlas+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_5f95004ff3e3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f93dc8e8e256.pdfIn PDF document text
    • https://josugonu.weebly.com/uploads/1/3/4/4/134488469/6422826.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369164/normal_5f9b76b81c503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418383/normal_5f9c1ad651d93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f9892062b338.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7648a396-4fc9-4294-b8ec-5298fe358361/39511624454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1969/7303/files/terzaghi_bearing_capacity_equation_for_circular_footing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9696/4261/files/death_note_l_death_ep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8691/2935/files/girezukamazekejaxasefid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8127/5808/files/41376771383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9665/7058/files/78288849076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4366/7143/files/man_of_culture_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6637/5325/files/peliculas_de_china_antigua.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8947/0643/files/bomag_bt65_repair_manual.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_off00004c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C7C 5412 bytes
SHA-256: 53c102332a162577819eaf8f7bc195cec32cb246a822e6151b6c5d5bda265e47
font_01_sfnt_off00005eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDA 10184 bytes
SHA-256: 2c505b45611c6e52f231bab666b47a76bf0ef6b405bb3b398fc12dc92a040724

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