Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07b93ef9f98d4fb…

MALICIOUS

PDF

49.9 KB Created: 2020-08-12 22:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5feed761fe753a20c2a1d6f015bd445 SHA-1: 569245428f131814249c59b5eedb1edac1b5c342 SHA-256: e07b93ef9f98d4fb0b4082e41d355a7fde746030d1ddd50b05fb2d014ae4c0ee
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'webpage to pdf extension firefox', suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the ultimate destination. The primary malicious IOC is the redirector URL.

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=webpage+to+pdf+extension+firefox
    • http://files.prigitalsolutions.com/uploads/1/3/0/7/130775441/gufaberejud-jufonawav-wixapevaba-gotikex.pdf
    • http://files.desireecrossman.net/uploads/1/3/1/3/131384573/1520528f117596.pdf
    • http://files.portugesestonethenaturalpath.com/uploads/1/3/1/1/131163943/judelanugutel.pdf
    • http://files.golovanortho.com/uploads/1/3/1/6/131637385/1d9845114fb.pdf
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/null_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0429/0327/3628/files/fijorikaxogiwig.pdf
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/buscopan_simples_ev_bula.pdf
    • https://cdn.shopify.com/s/files/1/0448/0113/0645/files/zt_anlaml_kelimeler_5._snf.pdf
    • https://cdn.shopify.com/s/files/1/0438/5836/2518/files/world_geographical_map_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/78657012765.pdf
    • https://cdn.shopify.com/s/files/1/0450/9263/4789/files/breaker_mitsubishi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/fizalatoxero.pdf
    • https://cdn.shopify.com/s/files/1/0433/7693/5068/files/birofo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/diravewowe.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_off000072f9.bin
398dbe1a2971729496a833c55478510c56856a5fb385862b9d1fd996140c4431
pdf-font-stream PDF embedded font (sfnt) at offset 0x72F9 5396 bytes
font_01_sfnt_off00008561.bin
400d97edd7ebc843938de3cdab2b555a1328d60cd0154915083304386710c093
pdf-font-stream PDF embedded font (sfnt) at offset 0x8561 6096 bytes
font_02_sfnt_off00009511.bin
6719f65ac42ed9be41dd839af38330900f9c53157845588bbebb10613af1f2d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x9511 10788 bytes