Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f14b7cce8ad45ea…

MALICIOUS

PDF

39.3 KB Created: 2020-08-14 21:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5ecdbac7ae2969d417bb6e46fc60452 SHA-1: c8c8becb53032b3a5a61afb95de98cade9dfc76d SHA-256: 3f14b7cce8ad45ea58cf9a2cecd532b79f927166ba75607b8556eda556465d7a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of direct payload execution.

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/wb?keyword=soapex%20sabonete%20bula%20pdf
    • http://nanejufak.brucedouglasreevesauthor.com/uploads/1/3/1/0/131070458/vejonezojinuk-vovobinadubu.pdf
    • http://sunuw.ronmilesphotography.com/uploads/1/3/1/4/131482975/703e518a7c.pdf
    • http://varig.lindseybethgoddard.com/uploads/1/3/2/6/132695584/lopekeb-wutivirubemoxef-gebikamexo.pdf
    • http://files.georgiandiningacademy.com/uploads/1/3/1/4/131455141/riremitepovano.pdf
    • http://zasurena.varvelinstallations.com/uploads/1/3/1/6/131637649/739bce460aedea.pdf
    • https://cdn.shopify.com/s/files/1/0431/2501/4684/files/5924790221.pdf
    • https://cdn.shopify.com/s/files/1/0433/8856/7706/files/detail_magazine_online.pdf
    • https://cdn.shopify.com/s/files/1/0451/0951/0297/files/buoyant_foundation.pdf
    • https://cdn.shopify.com/s/files/1/0440/7528/6693/files/31405056512.pdf
    • https://cdn.shopify.com/s/files/1/0439/5086/6590/files/pancreatitis_balthazar_e.pdf
    • https://cdn.shopify.com/s/files/1/0432/5723/3576/files/ditosetunajuxerosin.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/sutixixamegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gifizazuxapi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/tekalijunaruvukegixubused.pdf
    • https://cdn.shopify.com/s/files/1/0430/6088/7705/files/31027763612.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_off00005712.bin
2089e25562fd8539d2c0997cc13cb45fc923d1610205022ca29b2491085b637c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5712 5252 bytes
font_01_sfnt_off000068f8.bin
ac7133a42b7c94edaf41d0132a6ccb6d1099c33908301a14d9c6b531f5eb9c79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F8 12784 bytes

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