Malicious PDF — malware analysis report

Static analysis result for SHA-256 775d995fdf21a474…

MALICIOUS

PDF

44.4 KB Created: 2020-10-25 04:23:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: f3522fd245bbfa6f570d4bdf82cb7aa9 SHA-1: 46a7b4cc5a0585c6a41bfca17c0edd8c0423c1c7 SHA-256: 775d995fdf21a4744c61e8730f246140c89430e7318d6e386a0ced49f61788cc
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.link/pify?keyword=1978+prowler+trailer+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5f8ce90965f0c.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/68eed579.pdfIn PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/4090069.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006abd.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006abd.bin)
    • https://cdn.shopify.com/s/files/1/0482/8990/6852/files/lurinupepuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6580/2905/files/8605596065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7888/4759/files/fatigue_risk_management_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7481/7693/files/statistical_inference.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/bcom_1st_year_books_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/cms_covering_all_bases.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/physiology_of_muscle_tone.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/rugakol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0799/0184/files/22193848730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8268/8928/files/micom_3f_radio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/nakuv.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/gisosiligapurelan.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/lamufobajaxatubin.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 extracted file (font_00_sfnt_off00006abd.bin)

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABD 5264 bytes
SHA-256: 28db51bafe260229d56065fd272a2cafd038609395d596e3008e8125bf450cb9
font_01_sfnt_off00007ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA9 11784 bytes
SHA-256: d79dbdc862f578e8afe11b7de008028068c4326fc4b86b3f9605b806dc9b81a8

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