Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee3f298529361dc…

MALICIOUS

PDF

57.4 KB Created: 2020-08-28 19:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c0cdf0b7354435e493572bfa67805fd SHA-1: 9593d336a048e61c34a946a21388bd1e6b0e285c SHA-256: dee3f298529361dc8ed9c715049ae0645f8d80584c4ff8464209fff63b451697
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 pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which resolve to 'static.usrfiles.com'. The ML classifier strongly flagged this PDF as malicious. The presence of the redirector suggests an attempt to lure users to a malicious destination.

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/wix?keyword=libro+la+noche+de+tlatelolco
    • https://static.usrfiles.com/ugd/b8c837_54174a709f984c2095b8e28430d22a9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfc2266b12354d6bb593e96dbaea740c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f98fac90fa214322abfe941517a167fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_3654629aa2064e9a974cda5dc80845c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_8992c6c61f6a4a778ae1079b6b64cb02.pdf
    • https://static.usrfiles.com/ugd/b8c837_f8cb6a49217443a2bd38dc59a5914f8a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e41db60785a940b79d36a42069d4c010.pdf
    • https://static.usrfiles.com/ugd/b8c837_28659cd01f1f4b75b434e49e3ee1b8be.pdf
    • https://static.usrfiles.com/ugd/b8c837_465373ec0b344726a94903262a0b3410.pdf
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/nakali.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/waviduvuvirutuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7633/files/diabolik_lovers_game_download_englis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/lipomusopanova.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://static.usrfiles.com/ugd/b8c837_f98fac90fa21432

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a0d6.bin
abd5d0f45d6f9e0dba70b6eb25204caf671a64eb5c1f7e1978e9ad3b827d8ab8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0D6 4928 bytes
font_01_sfnt_off0000b180.bin
08b7be6f819dbe1faedc51dbc55872f44725a737e1cd3207714b5ccb8f3bd695		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB180 11748 bytes

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