Malicious PDF — malware analysis report

Static analysis result for SHA-256 215c94b263bf175e…

MALICIOUS

PDF

34.0 KB Created: 2020-08-09 23:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeca673ab642ab98b26a75f2bbd57e9e SHA-1: ec101365fb2f20adbcb6fe24323be25fa8bf9597 SHA-256: 215c94b263bf175e3bd5d6bc658efdb4128845cdf9a891cb129b7ed2dda21ea7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, including a critical link to a known malicious redirector at https://ttraff.cc/pify?keyword=caribbean+cuisine+cookbook+pdf. The document body, though heavily obfuscated, contains references to the cookbook lure and the malicious URL. The presence of numerous Shopify links suggests an attempt to blend in with legitimate content while directing users to malicious infrastructure.

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.cc/pify?keyword=caribbean+cuisine+cookbook+pdf
    • http://files.fortbraggheadlandsconsortium.org/uploads/1/3/1/4/131437885/4910804.pdf
    • http://files.mytipsytaboo.com/uploads/1/3/2/7/132710765/jakos.pdf
    • http://files.parentlednetwork.org/uploads/1/3/1/3/131384098/wususuwasoxozi.pdf
    • http://files.bakesterhistory.com/uploads/1/3/0/8/130874522/8b236742b5f7d05.pdf
    • http://files.taradaav.com/uploads/1/3/2/7/132712234/javisagepujurizir.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/94199151816.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/67099351317.pdf
    • https://cdn.shopify.com/s/files/1/0437/9086/0437/files/dipogepuxetobeseverib.pdf
    • https://cdn.shopify.com/s/files/1/0431/2635/8173/files/adobe_reader_for_android_free_download_apk.pdf
    • https://cdn.shopify.com/s/files/1/0438/1822/1730/files/ledatonaxinakowarasufo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8761/6413/files/brevet_anglais_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/4989/1478/files/96373218502.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/82685921900.pdf
    • https://cdn.shopify.com/s/files/1/0432/9521/1680/files/37235728131.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_off00004858.bin
7658cc8eed2cb27a94af8e1cc27658a483dac2ab3ac0c626cacb46b6a66e3c0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4858 5228 bytes
font_01_sfnt_off00005a27.bin
fcde6cb9526592d78e8c7208bb636f792d25cf9031ec92091a8f1bc44aa49b22
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A27 9616 bytes