Malicious PDF — malware analysis report

Static analysis result for SHA-256 45d1bb628c8411ed…

MALICIOUS

PDF

46.0 KB Created: 2020-08-26 14:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 054ba640509f3b58124d092a87e8a20f SHA-1: ee024505c4f96069b6f08223c846852da92c5889 SHA-256: 45d1bb628c8411ed8e48f9b0f00b8a54c86fc630072ad828a72bc163070ddcf4
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The primary malicious indicator is the embedded URL that redirects to 'ttraff.cc', a known malicious redirector. The document body, though heavily obfuscated, contains the target URL and references to 'jointer machine pdf', likely a lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=jointer+machine+pdf
    • http://files.pacificrimbusinessconsultants.com/uploads/1/3/1/4/131453006/2626862.pdf
    • http://forami.avonreplinda.org/uploads/1/3/1/0/131070450/dujisigupamumaferato.pdf
    • http://xatuz.fletcherscreek.com/uploads/1/3/0/8/130874284/088a1f1b59165e.pdf
    • http://mubon.mysummitagents.com/uploads/1/3/2/7/132740478/tuvakezupax-tasaz-tosarim.pdf
    • https://cdn.shopify.com/s/files/1/0434/2058/2050/files/mejut.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/4057514202.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/nalivepal.pdf
    • https://cdn.shopify.com/s/files/1/0434/8477/4552/files/51524972039.pdf
    • https://cdn.shopify.com/s/files/1/0436/0945/6803/files/anatomy_drawing_school_human_animal_comparative_anatomy_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/6879/0686/files/logomunaxagowedevaxi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1371/6643/files/86892104095.pdf
    • https://cdn.shopify.com/s/files/1/0432/7053/7374/files/85606379859.pdf
    • https://cdn.shopify.com/s/files/1/0445/3564/4319/files/adobe_photoshop_2020_book.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_off00006aab.bin
c1af4bb653c75775948fefd7a55070be7fe35f95d9eb237a6d2aaabc57b86eae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAB 5176 bytes
font_01_sfnt_off00007c11.bin
ba179a9e437906687fb719008d641f98c05106e0c2b466b47ff25b45eb570258		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C11 14836 bytes

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