Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f704f1e4cd8a2a…

MALICIOUS

PDF

56.4 KB Created: 2020-08-30 02:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db6690f3a7f1ddbdd492089e84d0f0dd SHA-1: e80f90d9995d1c65305043065d2c17fd61213803 SHA-256: 67f704f1e4cd8a2ac1d2a6a287a7855f32d423c102de3a3a36bbfe40c19676e1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious objective. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis to the document's structure and embedded URLs.

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/wix?keyword=digimon+lost+evolution+translation
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8790/4422/files/modutunosejajorixitozel.pdf
    • https://cdn.shopify.com/s/files/1/0438/4869/5958/files/bullying_fisico_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0447/5482/9463/files/apostasy_in_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0431/7977/0019/files/denezibozanudarito.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1932/files/5626024690.pdf
    • https://static.usrfiles.com/ugd/8b9728_cc0e9bc58e624bc18515e28ebd1f63b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc7a68105eab4662814b48350b85eaa7.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0d43d1519814115b32301c81109aad9.pdf
    • https://static.usrfiles.com/ugd/a18aa6_e4bea5f284ed430e93872806f91be552.pdf
    • https://static.usrfiles.com/ugd/69695d_14858c5db62f4e429874750d1e548a4b.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2f540c36f1c48febaffc0d2ab13633a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d875d13cd1e6451d9ac5728e0dbfcc71.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/mac_empty_container.pdf
    • https://cdn.shopify.com/s/files/1/0443/8743/4662/files/pifiketojaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/1837/0728/files/ansi_c_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2992/8863/files/rich_dad_poor_dad_in_hindi_audio_boo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dc2.bin
4209bb40c65a1f3fafb4dc329cce7f246bad5168d5df0394dbccfbed1eaccf35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC2 11924 bytes
font_01_sfnt_off00009523.bin
4de16171287d3135c8eef2d29b7c3372441869461cd3b4976a997d237ef003d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9523 5064 bytes
font_02_sfnt_off0000a653.bin
c6d0122611cdabc4e88ad31f4286d7005a393850932a953d65b765a35f8d4a1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA653 14556 bytes

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