Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4e7700b9650c22…

MALICIOUS

PDF

46.0 KB Created: 2020-08-09 17:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c34434cb0d10746b124ff71964152f36 SHA-1: fb671015b98dd63d0526fbb8e201ed60dd528b2b SHA-256: 3e4e7700b9650c22832ccbb16f9b6587a4b46234eed919c568c96dbdacc46d86
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=bovarismo+brasileiro+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the lure. The primary attack pattern involves redirecting the user to malicious infrastructure.

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=bovarismo+brasileiro+pdf
    • http://files.greenleaforganizing.com/uploads/1/3/2/6/132681855/kunedimapuf.pdf
    • http://xewobuwu.christianfitnesstv.com/uploads/1/3/0/8/130814328/zumatanunajo-rasolurop.pdf
    • http://files.siglapscec.com/uploads/1/3/2/6/132682113/mevesoroximex_rogavadoduvaj_vemezob.pdf
    • http://xarevilo.thebalistreetdog.com/uploads/1/3/0/8/130874254/durukapuduge_jufalojasonamuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/javefoxipoxogozi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9595/6386/files/xepomilidasokim.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/blacksburg_transit_routes.pdf
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/gefeduzoxa.pdf
    • https://cdn.shopify.com/s/files/1/0440/8115/2152/files/cen_tech_digital_multimeter_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0565/6736/files/41606339402.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/komamivelifofamokedukoxe.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2243/files/70128161770.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/66132056463.pdf
    • https://cdn.shopify.com/s/files/1/0431/0577/9878/files/71737587510.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/80457488233.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/wakuwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/74282448378.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9973/files/lixafebopusorobilizud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068b7.bin
9b2520bb988ae3257b541e7248bab4ea9f00546f867e1bab98fc92816802e083
pdf-font-stream PDF embedded font (sfnt) at offset 0x68B7 5040 bytes
font_01_sfnt_off000079d0.bin
2b677c56087841331035ada697142f1a387510c3d1db9d094b60ff1fe048191f
pdf-font-stream PDF embedded font (sfnt) at offset 0x79D0 10156 bytes
font_02_sfnt_off00009c62.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C62 4324 bytes