Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc7c1cf229e7ff3…

MALICIOUS

PDF

41.5 KB Created: 2020-09-06 19:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 015367d4f7dd40697759bd3f132295be SHA-1: 055853230209b2e287c030803e4d4a799a609e09 SHA-256: dbc7c1cf229e7ff3f9608e5e85c8d844c446a3b95392a1f6319c99391608ad52
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, identified as a PDF link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.link/wix?keyword=sentence+completion+worksheets+2nd+grade', is a clear indicator of a phishing or redirection attempt. The document body, though heavily obfuscated, contains references to educational content, suggesting a lure to entice clicks.

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.link/wix?keyword=sentence+completion+worksheets+2nd+grade
    • https://cdn.shopify.com/s/files/1/0432/6857/1294/files/56106680017.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/navbar_apps_pro_apk_3._0.pdf
    • https://cdn.shopify.com/s/files/1/0462/8132/6752/files/last_night_s_tv_guide_uk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wonazonuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/53057871723.pdf
    • https://cdn.shopify.com/s/files/1/0441/0910/3256/files/rann_goldrich_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/0337/7824/files/basic_calculus_book_grade_11.pdf
    • https://cdn.shopify.com/s/files/1/0433/6772/7269/files/futsal_score_sheet_template.pdf
    • https://cdn.shopify.com/s/files/1/0457/3695/1964/files/adobe_photoshop_mix_for_android_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6071/files/38394298833.pdf
    • https://static.usrfiles.com/ugd/5e8de6_ec687ddefcad43d09e67b74c02cd7880.pdf
    • https://static.usrfiles.com/ugd/f967ac_cff9f9ed69d6434ea8b53fbed5d5ebc4.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdba102466e944d28201341681839255.pdf
    • https://static.usrfiles.com/ugd/7ff653_28c1c2a7cc1440e0ba6e7fb9777e4a3a.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006340.bin
fd30cb4b87b06b972c56863d1288c1c88c2fce23f276d159c310cfec3639afba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6340 5876 bytes
font_01_sfnt_off0000772a.bin
c6305ceba1c1ae29753aeefb8ed99e42b37f6eb0d1516b5e982518318efd81e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x772A 9812 bytes

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