Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f48ff12b2fd653f…

MALICIOUS

PDF

42.9 KB Created: 2020-08-20 23:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 042e1985ed3515695a447a66d27fe710 SHA-1: e3b62746ff552be2ec3297764d19034a7fb176a5 SHA-256: 2f48ff12b2fd653f2a115b2d3e6036fdb08952909640ab0a81d67d8f4e8d840d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and references 'Czytanki dla dzieci angielski pdf', suggesting a lure. The presence of numerous Shopify-hosted PDF links, while many are benign, indicates a potential link farm strategy to obscure the malicious destination. The primary malicious IOC is the ttraff.com redirector.

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.com/pify?keyword=czytanki+dla+dzieci+angielski+pdf
    • http://files.rethinkstigma.org/uploads/1/3/0/8/130874240/dazoladanifip.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/quote_text_discord.pdf
    • https://cdn.shopify.com/s/files/1/0440/0729/3086/files/22270688006.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/karalejurixarewutuvux.pdf
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/fanoposomerewipibi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7448/6421/files/robin_hobb_book_order.pdf
    • https://cdn.shopify.com/s/files/1/0428/7895/9775/files/tizopa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9717/6741/files/american_english_file_book_1.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/world_of_warcraft_rpg_dark_factions.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/vipunasavidezidofukutegu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0629/files/mesusonibarawimi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4384/0412/files/dememitonejoxanaxepof.pdf
    • https://cdn.shopify.com/s/files/1/0437/4082/3706/files/aspects_of_sustainable_development.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_off00006813.bin
6ad4c9bf12993ef9cc077c05a1a6c12fabb13286e6666bb9e3136881999ae8ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6813 5348 bytes
font_01_sfnt_off00007a71.bin
9628620707b29485af34e8eca39aaf38780227d5d9f2b65ccc9ac17e2eda4413		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A71 11472 bytes

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