Malicious PDF — malware analysis report

Static analysis result for SHA-256 866c727d9f076f24…

MALICIOUS

PDF

46.7 KB Created: 2020-07-30 16:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1797915f103ede95e1b918091c346d3 SHA-1: 4c1bc77a38fa471eba1eb12d3f5d5ed872b82882 SHA-256: 866c727d9f076f2458a62b758db4ecf04159e39b55b79cab0b4987ef5a648d7f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, indicating the document's primary purpose is to lure users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous external links, as noted by PDF_SEO_LINK_FARM, suggests a tactic to distribute malicious content or engage in SEO manipulation for malicious purposes.

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/pify?keyword=contaminacion+por+botellas+de+plastico+pdf
    • http://files.ninelivestwine.com/uploads/1/3/0/8/130874629/vezik_gunefitotokek.pdf
    • http://files.feathersalliance.com/uploads/1/3/1/6/131606492/rixik_joxawobife_kofido_xogixo.pdf
    • http://files.pinkcheeksbymadeleine.com/uploads/1/3/1/1/131163976/00d756d3e386.pdf
    • http://files.tvhsbasketball.com/uploads/1/3/1/3/131384635/gibuzafa-pejomewigejuru-xeduxojipaxas.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/30233098108.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6444/files/99125572978.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/75569306837.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/70012703851.pdf
    • https://cdn.shopify.com/s/files/1/0434/0337/8839/files/xewajot.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/zezulawuxigaxanabuxuso.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2478/files/juzijogaxeke.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/bejipogilipewejirivit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6930/files/14048120652.pdf
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/386383019.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0918/files/7422513020.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/69639291352.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_off0000752b.bin
2b4adab92286cb99f19945fd601e5da2d75546e1996542898711b589d184e8aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x752B 5252 bytes
font_01_sfnt_off000086dc.bin
6c5949d8b1b87c4439678e87308a4f1d47b57ae61873a0ae7bae368d7aa2455d
pdf-font-stream PDF embedded font (sfnt) at offset 0x86DC 11364 bytes