Malicious PDF — malware analysis report

Static analysis result for SHA-256 e011a57a7528c54b…

MALICIOUS

PDF

36.4 KB Created: 2020-07-30 19:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc0729efa3e58192ecc7c62679b3b63b SHA-1: a1135eb6c3828194060ebc1ad631fba9a09b374b SHA-256: e011a57a7528c54b79c866fe6a39cf2bd7ba6cc6cbd81e73c730fb8ae3071daa
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a link farm designed to redirect users to malicious infrastructure. The primary heuristic indicates a link to a known malicious redirector, ttraff.cc, which is disguised as a download for 'believer guitar notes pdf'. The ML classifier strongly supports the malicious nature of this PDF.

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=believer+guitar+notes+pdf
    • http://files.champdogfilms.com/uploads/1/3/0/8/130874254/e203146d72d.pdf
    • http://files.enchantedboutiquemn.com/uploads/1/3/1/4/131453100/dagelatepipud.pdf
    • http://files.quiltcoeast.org/uploads/1/3/1/6/131637016/jojuxekazozolat_pibexedijafetid_rakomikopoxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6911/files/sesenoxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xarapidarobumebavo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4496/1436/files/21599297133.pdf
    • https://cdn.shopify.com/s/files/1/0431/4696/9237/files/moxadik.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/savovemiturugugufapot.pdf
    • https://cdn.shopify.com/s/files/1/0430/3237/9545/files/vazonizejov.pdf
    • https://cdn.shopify.com/s/files/1/0434/3539/3191/files/38137253204.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/95690020754.pdf
    • https://cdn.shopify.com/s/files/1/0430/8441/5143/files/73346232511.pdf
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/43179091940.pdf
    • https://cdn.shopify.com/s/files/1/0437/1392/1189/files/kigosajid.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/29278520089.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/
    • https://cdn.shopify.com/s/files/1/0431/4696/9237/files/moxadik

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005496.bin
836dbac653a98d64fe7c4bad6954360e93b4f7a781689e66a1343ea0e267983b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5496 5200 bytes
font_01_sfnt_off0000665b.bin
0924636507dd01c5e8154b3e28a26fa114d8cf9941eae1e506b1d6fab2ea3db8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x665B 8952 bytes

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