Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7dd7426d51ba38…

MALICIOUS

PDF

48.3 KB Created: 2020-08-08 08:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c3e2214a21ccb62c63f7dd7facf4920 SHA-1: 5f5de7df31f59a13d88517877d099118d124e892 SHA-256: ce7dd7426d51ba386704c2b837774bb13ad6536545adc7a490be10b537a21857
154 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.ru'. This URL is embedded within the document body, disguised as a link to download 'south african traditional recipes pdf'. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm for SEO manipulation, likely to obscure the malicious redirector. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.ru/pify?keyword=south+african+traditional+recipes+pdf
    • http://files.balancedforlifeyoga.com/uploads/1/3/2/7/132741162/zirukumoluv.pdf
    • http://files.15songseverykidshouldknow.com/uploads/1/3/1/8/131872178/dodawa-noroj-sitawutefokuju.pdf
    • http://files.petrichorartanddesign.com/uploads/1/3/0/8/130814588/96b19ac28f46330.pdf
    • http://files.sherryjoyce.com/uploads/1/3/1/4/131406663/30e65c.pdf
    • https://cdn.shopify.com/s/files/1/0436/7617/2441/files/hunger_games_free_ebook_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/wopejabev.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/fusionner_fichier_avec_creator.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/99976165642.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/jw_broadcasting_songs_chords.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/82074204525.pdf
    • https://cdn.shopify.com/s/files/1/0431/9612/1251/files/fuck_we_are_under_attack.pdf
    • https://cdn.shopify.com/s/files/1/0437/7736/0029/files/33552115872.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/19090845816.pdf
    • https://cdn.shopify.com/s/files/1/0436/5670/8254/files/pakoju.pdf
    • https://cdn.shopify.com/s/files/1/0434/6898/0377/files/53538167668.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_off000069a4.bin
bbb9bfb68fbae449620eb84a5b23c839265d59ed9ac79f4888f3f7e3c10e03b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A4 5344 bytes
font_01_sfnt_off00007bd1.bin
1a3837ebb4a882189d61edbc405a47a0b0065c410439ebe41b8e7eafe6dc71be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD1 10312 bytes
font_02_sfnt_off00009f4b.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F4B 16036 bytes

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