Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a30b2fcbf97b293…

MALICIOUS

PDF

45.0 KB Created: 2020-08-30 11:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b64ef435b91748ad5f1880b704e1904a SHA-1: 1416e121c4ed3b232bb5ce4c910ffcd39dca9e7c SHA-256: 3a30b2fcbf97b2934e4f40863c3c414f30c6fd4a4135b77675929110c7900d4c
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily corrupted, contains text related to a product review and the malicious URL, suggesting a lure. The presence of numerous embedded links, many pointing to external PDFs, indicates a link farm strategy, likely to improve search engine ranking for malicious content.

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.me/wix?keyword=asus+m32bf+desktop+pc+review
    • https://static.usrfiles.com/ugd/d78803_f49da97d8e2f49cf99ff49f41c606ffa.pdf
    • https://static.usrfiles.com/ugd/2ac701_436460efc0ab451ab588108978baa3fe.pdf
    • https://static.usrfiles.com/ugd/15cd4d_cae9277d71df434981d0f38536d17da0.pdf
    • https://static.usrfiles.com/ugd/b8c837_9626813987cf4cf2a2853db0e124cfbc.pdf
    • https://static.usrfiles.com/ugd/bf650e_3381611b3358474697a0b554e47c0330.pdf
    • https://static.usrfiles.com/ugd/b8c837_04d8e41eec2e4a3e8810ceb995697b7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_34ddd6257b554724ad6efc2ae1960b0b.pdf
    • https://static.usrfiles.com/ugd/9cb927_ae0557dd47474869afff11e584f36e8e.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/jejemirota.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7802/files/etica_medica_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/getuzefazafuno.pdf
    • https://cdn.shopify.com/s/files/1/0441/0333/6088/files/numakejuvazokuzudoxipus.pdf
    • https://cdn.shopify.com/s/files/1/0434/5187/5494/files/48331127180.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8390/files/shiva_rudram_full_namakam_chamakam_devanagari_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/internacionalizacion_de_las_operaciones_bursatiles.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2111/files/zulogezaze.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4407/files/fewukafepiwikopizat.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/wujafawibazur.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_off00006acd.bin
421c0049e51bfc2a763737d91ca0db9890f8567b06144e0228fbbab6a76f2d24
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACD 5700 bytes
font_01_sfnt_off00007e25.bin
1e1412b04e5434aacaa43b2c17faa29578852ea4d7e8d7d34172c1daa7b773f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E25 12716 bytes