Malicious PDF — malware analysis report

Static analysis result for SHA-256 b586a330d30144a8…

MALICIOUS

PDF

47.8 KB Created: 2020-08-10 05:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28410edc7bd304c4536bf3306d5b0260 SHA-1: 5231c069449f89936346942b6c053ffd81db5fdf SHA-256: b586a330d30144a8e699c1a58c46360c7e95fccc17462e08c613e7d472a52f02
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with one prominent link designed to appear as a Tchaikovsky Swan Lake piano PDF. This link redirects to malicious infrastructure, indicating a phishing or redirection attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.ru/pify?keyword=tchaikovsky+swan+lake+piano+pdf
    • http://jusuloli.sivitgear.com/uploads/1/3/1/3/131379578/zuguwijalet_vuvelof.pdf
    • http://files.saludabaptist.org/uploads/1/3/1/4/131453245/nukuxa_domidafawaza_kabanemoz_mukategalapu.pdf
    • http://files.greenworldwriting.com/uploads/1/3/1/0/131070089/1544683.pdf
    • https://cdn.shopify.com/s/files/1/0433/6526/9669/files/jakij.pdf
    • https://cdn.shopify.com/s/files/1/0434/4302/8120/files/refizuxobusitozajafavas.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3809/files/7444974021.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/navamemaburo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/ford_535_backhoe_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/3975/8235/files/xovafexide.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2478/files/duterajulibubevisewamizir.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/jizesujegajobagij.pdf
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/99_names_of_allah_in_tamil_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/82412877570.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/vajivezogesen.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/bhagavad_gita_english_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/5584/8355/files/dj_shadow_six_days.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/18278567797.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bc1.bin
97d48f246790ae37845f695f8d859aed743be2e1fce6fb9ca13cdd4c3ac28417
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC1 5416 bytes
font_01_sfnt_off00008e4e.bin
99b8467f1e6eaaf475158e9cbf715ee6da5887c72ac5100b31e6270e1fb0d0c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4E 10536 bytes