Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b9e4e84d8378ee9…

MALICIOUS

PDF

41.4 KB Created: 2020-08-21 08:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b61b411c699f9b877747d368087cc7e8 SHA-1: e6a496ed3278b2979a725c6949a498df4f41176a SHA-256: 4b9e4e84d8378ee92afe09a8c121231fb33090fcc032ecbeeb7ee9fb0540804a
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm pointing to a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=printable+height+chart+template, which is likely used to obscure the final destination of the attack. Another unknown URL, http://fetudo.ameliaharrisphotography.com/uploads/1/3/2/8/132814930/sediwesewofen_wetajukumu.pdf, was also extracted. The document body, though heavily obfuscated, also contains references to these URLs, reinforcing the malicious intent.

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=printable+height+chart+template
    • http://fetudo.ameliaharrisphotography.com/uploads/1/3/2/8/132814930/sediwesewofen_wetajukumu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/tal_dorei_campaign.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/install_android_studio_for_ubuntu_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0429/5242/5631/files/38958334408.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/adverbs_worksheet_2nd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0436/9979/8166/files/icom_ic-_718_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/neon_trees_animal_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/63521349852.pdf
    • https://cdn.shopify.com/s/files/1/0436/1981/1490/files/top_500_companies_in_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/jisikukejinufiduvef.pdf
    • https://cdn.shopify.com/s/files/1/0428/4959/9651/files/62193386013.pdf
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/mobezulawozitarititut.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/12079597913.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_off00006429.bin
aade0dc843134d8eaca3c28f4c4f7be4835c230ea1903120dd70b80bd95c077d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6429 5308 bytes
font_01_sfnt_off00007603.bin
4b94fdac8e598952e249a9fb5403af40c7a61dcb4bda906bdc4850f8ad353692		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7603 10236 bytes

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