Malicious PDF — malware analysis report

Static analysis result for SHA-256 df4cc35692f8a95a…

MALICIOUS

PDF

51.2 KB Created: 2020-09-28 17:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03388a4154b625fe272e5755cfdc9b94 SHA-1: 9d691a74734e724b3e63cdf62cd87159c6bea599 SHA-256: df4cc35692f8a95a0405019e164dd4f71f7d4041d5f8ce4375546485053809a1
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at https://cctraff.ru/mozel. The document body, though heavily obfuscated, contains text related to 'ctet 2019 official notification pdf', suggesting a lure. The presence of a link farm heuristic further indicates malicious intent to drive traffic to potentially harmful sites. No scripts were extracted from this sample.

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://cctraff.ru/mozel?keyword=ctet+2019+official+notification+pdf
    • http://files.mrbuker.com/uploads/1/3/0/7/130775677/4680a1c963f0.pdf
    • http://files.trailmedal.com/uploads/1/3/1/3/131380814/8a5344e.pdf
    • http://files.ponderingcat.com/uploads/1/3/1/3/131384429/4dfa0ac6ee05.pdf
    • https://site-1037086.mozfiles.com/files/1037086/93700916381.pdf
    • https://site-1037138.mozfiles.com/files/1037138/81042121950.pdf
    • https://cdn.shopify.com/s/files/1/0483/7100/7637/files/pokemon_platinum_action_replay_codes_rare_candy.pdf
    • https://cdn.shopify.com/s/files/1/0428/5038/6079/files/my_boy_apk_download_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0434/6816/1176/files/south_of_the_border_west_of_the_sun_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/79223091665.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/31598465372.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/finding_percentages_of_amounts_worksheet_year_6.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/27681942507.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_off00007aa6.bin
4dc672489a8803098cc5641c7e4a85ec2c99b8289ebd064c03bd4b35b410f741		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA6 5260 bytes
font_01_sfnt_off00008ca7.bin
96a88b24f5e8b21db844f0f5b73a513cbfa077f02fd36ae4e79bb070405dbf3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA7 10768 bytes
font_02_sfnt_off0000b170.bin
fd9508b8a355b1dcf0ac53030005f079175ab5094d68ae1ef1f8d7d2fbf45dbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB170 3776 bytes

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