Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb95a468230da74…

MALICIOUS

PDF

47.4 KB Created: 2020-08-06 05:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ea8663dd772e101a81eefcab3a10efd SHA-1: 458f2bfbe08b51f5ad78fed5bc01cf37f62380ae SHA-256: bbb95a468230da7409f7911c7b0b704d2fbbdc5bb826eeacc1d24e95fdeba4dd
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'Google academico brasil pdf'. This URL, https://ttraff.cc/pify?keyword=google+academico+brasil+pdf, redirects to a malicious domain, indicating a phishing or redirection attempt. The presence of a link farm further supports the malicious intent.

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=google+academico+brasil+pdf
    • http://files.aninvisiblethreadnovel.com/uploads/1/3/1/4/131437984/budalupokibedob.pdf
    • http://files.valsbrewtreats.com/uploads/1/3/2/7/132740275/6d57a.pdf
    • http://files.mtairyvillage.com/uploads/1/3/0/8/130814411/54e94.pdf
    • http://files.vi-vi.org/uploads/1/3/1/4/131408103/funogijesetili_xijaru_pekufokupudos_vuxowo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/97012910281.pdf
    • https://cdn.shopify.com/s/files/1/0435/8550/3393/files/beethoven_ode_to_joy_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8904/files/nusarawobikojejumaxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6444/files/43808475153.pdf
    • https://cdn.shopify.com/s/files/1/0437/7346/0641/files/10477977011.pdf
    • https://cdn.shopify.com/s/files/1/0434/5430/0312/files/39985569595.pdf
    • https://cdn.shopify.com/s/files/1/0436/8970/5625/files/genevejukuraxipotuzi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/87758115086.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/8243770942.pdf
    • https://cdn.shopify.com/s/files/1/0439/3756/2779/files/mac_key_code.pdf
    • https://cdn.shopify.com/s/files/1/0436/7712/2713/files/64578574326.pdf
    • https://cdn.shopify.com/s/files/1/0437/3394/2423/files/32844241812.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/92190664750.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_off000079e1.bin
41dc8f8f2f4b7a1d6b947f1d6e76801e1a6ffbb1fd1d6e06ea0a02a2c5579551		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E1 5644 bytes
font_01_sfnt_off00008cfb.bin
ec4a4a45d7e5b4234eebfd5625b3967fab9d88d04e5c438127bb980f43ecb014		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFB 10524 bytes

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