Malicious PDF — malware analysis report

Static analysis result for SHA-256 562f8e6bc569fcdc…

MALICIOUS

PDF

44.4 KB Created: 2020-07-29 21:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7b62d331e866cdb78609358c877326e SHA-1: 5cd562069929b6df926a98f3df8950ce1b5531bc SHA-256: 562f8e6bc569fcdc898b4e61c6ec5bd580265c92b96db1e2c2745b8e8bb50736
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure for a free PDF download. The presence of numerous external links, many pointing to Shopify domains, indicates a link farm strategy to obscure the malicious redirector. 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=libro+usar+el+cerebro+pdf+gratis
    • http://files.florenceecarol.com/uploads/1/3/2/6/132695668/24e6781791c4af.pdf
    • http://files.sid1.org/uploads/1/3/1/6/131606069/domakorapoz_karefox_senuvexuxagaki.pdf
    • http://files.neyensequence.com/uploads/1/3/1/3/131398452/tetoderemaxed_liwewuwidul.pdf
    • http://files.florenceecarol.com
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/nisekidapoluvodufetewa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/92024855789.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0431/7741/0724/files/70020579126.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/56778994585.pdf
    • https://cdn.shopify.com/s/files/1/0434/3028/1381/files/96170092440.pdf
    • https://cdn.shopify.com/s/files/1/0438/4954/7936/files/lixogegepemolebavug.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/31562659870.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/76843566366.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/xeleg.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_off00006be5.bin
6bc58f11352418df4b70f343512cfca564cb124a24ffeee8d2780b7ae29cf10a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE5 5180 bytes
font_01_sfnt_off00007d93.bin
0de9520c8ad4fd301c47a8f2ddda4f952ad326d048390dd51cbbba3c58ffd07a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D93 11552 bytes

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