Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd33c8bd08ab5f8a…

MALICIOUS

PDF

48.3 KB Created: 2020-08-09 22:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71f80bdd28f844d82cff2ee510d9e64f SHA-1: fe6f74eec0329b1925bebd0c138a297cac2fb849 SHA-256: bd33c8bd08ab5f8a3d064bc8f32e63a8120588875ce5a66b9fe67e37ec859bf0
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The link leads to 'https://ttraff.cc/pify?keyword=calculus+1+review+pdf', suggesting a phishing or scam attempt. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. No scripts were extracted from this sample.

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=calculus+1+review+pdf
    • http://files.heartandvineapothecary.com/uploads/1/3/2/6/132682655/3ba6b7ae.pdf
    • http://files.andreasscience.com/uploads/1/3/2/6/132696506/93d2cda.pdf
    • http://defini.vinylwrapmilwaukee.com/uploads/1/3/2/6/132681670/razizezage_mesij_soruj_bufapebevinezij.pdf
    • http://files.bostonhelicopters.com/uploads/1/3/1/3/131398504/tupamedoxesisogozet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0818/files/muwewematatubororesefepuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/7854/1722/files/acids_bases_and_salts_class_10_sample_papers.pdf
    • https://cdn.shopify.com/s/files/1/0431/5096/6950/files/69817085529.pdf
    • https://cdn.shopify.com/s/files/1/0434/1773/1229/files/bapeso.pdf
    • https://cdn.shopify.com/s/files/1/0434/9915/9718/files/jetemog.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8106/files/98387547669.pdf
    • https://cdn.shopify.com/s/files/1/0438/3028/0352/files/libro_para_aprender_ingles_desde_cero.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/gusomarexalito.pdf
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/1_99_mining_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/3735/2358/files/raxotuzixefemuwob.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8320/files/kunupenukaxaxokuga.pdf
    • https://cdn.shopify.com/s/files/1/0438/1373/2512/files/savunovarigelisalabu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/1861607650.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_off00008143.bin
da2b19d1482ae5736218a29a5304c2f65702fe25960be2c0bd33fd46bfddb75f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8143 5260 bytes
font_01_sfnt_off0000934b.bin
3958dce6a511438ca98403f9938dcf68c4dddfa34e446ae3d766d4f3c0de165b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x934B 9568 bytes

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