Malicious PDF — malware analysis report

Static analysis result for SHA-256 3299d6b9686c7cab…

MALICIOUS

PDF

44.0 KB Created: 2020-08-28 10:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3b4e46ff7a64b9fa55cec7f9331e68b3 SHA-1: f5add1ad43531431a74b90a5fb347625b2a5ee35 SHA-256: 3299d6b9686c7cabfc948196a4d1dbe69e24e993cce0507f6ed23d6a5b80cc15
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=voice+sight+reading+exercises In PDF document text
    • http://files.frevoathome.com/uploads/1/3/1/6/131606150/lukinonizexel.pdfIn PDF document text
    • http://zuketo.undergroundblend.com/uploads/1/3/1/0/131070450/3b41e338878f89.pdfIn PDF document text
    • http://files.colorreadings.com/uploads/1/3/0/7/130776254/panatisafataxexofaze.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/1/0433/0346/9221/files/reynolds_foodservice_aluminum_foil_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5396/4712/files/vatatabigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/kulefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3388/5846/files/treatment_of_bunionette_deformity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/bollywood_music_video_songs_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9341/7367/files/sample_email_format_for_job_application.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xawifakupubegezixezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/1224345356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/42614254389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6740/0601/files/mimi_lesemaus_anlauttabelle.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_off000065ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AD 5204 bytes
SHA-256: 835df037fda4a26107b9d7d27869623b079aeefb3d69ed4c6ce80dd1f7e4043e
font_01_sfnt_off00007746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7746 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00007fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD3 10272 bytes
SHA-256: 26de148bcebaf180c9ddf618ce480410f14ed67a9ef20e3d7fe72faa04768cbd