Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d88ce5e7e3056a2…

MALICIOUS

PDF

43.1 KB Created: 2020-08-09 16:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ad306e8dfe2675bb7c25dbcfe4e4b15 SHA-1: 55b26db33bffcdaf087162f6838a3f4ec3acd4b3 SHA-256: 4d88ce5e7e3056a2680c294c7698c3969665b174ec8e220285e51dd0b4c5e393
150 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDFs, a common tactic for SEO poisoning and traffic redirection. One of these links, 'https://ttraff.com/pify?keyword=adolescent+psychology+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. 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.com/pify?keyword=adolescent+psychology+pdf
    • http://files.lindamitchellbooks.com/uploads/1/3/1/0/131070452/livevamob_suxowis_wubukaxokakira.pdf
    • http://files.yosemitepet.com/uploads/1/3/1/0/131070137/84b27ef15a.pdf
    • http://files.bsakoaks.com/uploads/1/3/2/6/132696210/xuzowafo-menutosun-kosimo.pdf
    • http://files.anthonydwatkins.com/uploads/1/3/2/6/132696335/pevuse.pdf
    • http://files.cheyennesheriffcolorado.com/uploads/1/3/1/3/131397996/609646.pdf
    • https://cdn.shopify.com/s/files/1/0434/4718/9670/files/bambuterapia_livro.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/vutakeberexixovuvojume.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nadogenomaxijedunebenez.pdf
    • https://cdn.shopify.com/s/files/1/0444/3871/6583/files/burial_rites_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9860/3669/files/how_to_delete_all_your_tweets.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/bobifafofexuteb.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/53340643214.pdf
    • https://cdn.shopify.com/s/files/1/0448/0273/6279/files/darwin_theory_of_evolution_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdf
    • https://cdn.shopify.com/s/files/1/0433/0710/6462/files/56722885949.pdf
    • https://cdn.shopify.com/s/files/1/0439/1262/6344/files/rt_n66u_tomato.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sovir.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/61672909462.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_off00006b82.bin
c7120ab535c27cec318480bb394adedba53f08638ac2e1ef8c2fe8701ebf74b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B82 5200 bytes
font_01_sfnt_off00007d4b.bin
c2f35e407c2ffa1cacc1103e7fea932cb58f5f648d39d7673c1b777f45c3e5f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4B 10044 bytes