Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecbfd9db0515c2c1…

MALICIOUS

PDF

44.2 KB Created: 2020-08-08 17:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e9f46292a883c3b506a80877df9b912 SHA-1: cccb771b20b3d44bd85022e70e0842c0f226fb2c SHA-256: ecbfd9db0515c2c17f81febeaa3fe72aa8c009d20bfee6fde9a7d3a10ba66224
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic firing indicates that a link within the document leads to a known malicious redirector infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=cinematography+lighting+books+pdf', suggesting a lure to download or view content related to cinematography books, which then redirects to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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=cinematography+lighting+books+pdf
    • http://bujobe.livingthelifeworldwide.com/uploads/1/3/1/4/131454065/rivedubiwaza.pdf
    • http://files.antiguoantiquesanddecorative.com/uploads/1/3/1/3/131383673/joselatitivigofof.pdf
    • http://files.clubicelandsocal.com/uploads/1/3/0/7/130740138/6afc56bbce981cd.pdf
    • http://files.drstephensroka.com/uploads/1/3/1/4/131483009/523163.pdf
    • https://cdn.shopify.com/s/files/1/0434/5731/4977/files/creative_and_critical_thinking_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/7236/4437/files/63353946612.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/ninopusafubezad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mafimovudowejiner.pdf
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/bozuzefunu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/magagekegidunabogan.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/colloquial_egyptian_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0432/6896/4505/files/bosavi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/95961276019.pdf
    • https://cdn.shopify.com/s/files/1/0437/1388/8405/files/mujutezevevikelejo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojezurin.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8167/files/jitulegoduvepodudodavat.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1578/files/geverukemegefozeduze.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d13.bin
5a61bc18895add9199bbf7258d69f9d1bde178dc160efbcbfc32ae1df121aa30
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D13 5668 bytes
font_01_sfnt_off0000802e.bin
20e0cef483bc827d36b3e2cccebf5bec45bb3dcd3fa780649f42cfd2b6ddefec
pdf-font-stream PDF embedded font (sfnt) at offset 0x802E 10576 bytes