Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae1ed181f476e333…

MALICIOUS

PDF

48.5 KB Created: 2020-10-09 04:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 739ce62d7db6861389422f368bcae163 SHA-1: 602df0a19ffa29f0770c007e81da9799e632cf3a SHA-256: ae1ed181f476e3335baaedb483c8b3635532d9ff37681e5859d2027bfeb64b85
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://cctraff.ru/strik?keyword=sunda+wiwitan+pdf In PDF document text
    • http://nivedel.whiteboardsandwanderlust.com/uploads/1/3/1/1/131164067/eea86b23b0b1770.pdfIn PDF document text
    • http://files.dansartworksd.com/uploads/1/3/2/3/132302733/fitarime.pdfIn PDF document text
    • https://site-1038477.mozfiles.com/files/1038477/noruvitipipexox.pdfIn PDF document text
    • https://site-1043538.mozfiles.com/files/1043538/nozaxekezonixilutuvijet.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/44233308120.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/1/0481/5994/8951/files/jevewebepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8972/6107/files/fallout_new_vegas_casino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0649/4373/files/dna_structure_review_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2855/9510/files/10203297549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7832/3876/files/wavobafipubupijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9358/4800/files/willy_wonka_song_lyrics_russ.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3023/6314/files/mujusukezexedesisuwube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/wovekafajixediva.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_off0000826a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826A 4924 bytes
SHA-256: fc3ac7d8d9e2a8eb60b9179e080a26986ce6b1ff9583cc58b1029d7b6146755a
font_01_sfnt_off0000935b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x935B 10104 bytes
SHA-256: c1ea120cd7bc3429ef1d5c31d2b5abf564cc7ab97865249564e731aaae0d1e7e