Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e046aa2832405d…

MALICIOUS

PDF

35.7 KB Created: 2020-08-20 18:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c84eaa2bb36afc2f690a0127d61a988 SHA-1: 76d7df34eca331982def1e51b10e11b5937a157a SHA-256: 56e046aa2832405dd114ec2a58fe806c6dcd8e6f84630a70642dafa4082c7346
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a PDF link farm. One of the primary links directs to a redirector service (ttraff.cc), which is a common technique to obscure malicious destinations. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, but the presence of the redirector URL and the link farm structure strongly suggest a malicious intent, likely for phishing or malware distribution.

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.cc/pify?keyword=bossam+v6+pc
    • http://files.johnpaulson.greatwebsitebuilder.com/uploads/1/3/1/4/131453022/bb34c111970da2d.pdf
    • http://files.lvccpp.com/uploads/1/3/2/6/132682655/vinomimisadir.pdf
    • https://cdn.shopify.com/s/files/1/0447/8684/3799/files/bank_clerk_exam_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/1762/4990/files/28344808904.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuxevitilikibuvenimomabu.pdf
    • https://cdn.shopify.com/s/files/1/0445/3181/0463/files/risk_board_game_map.pdf
    • https://cdn.shopify.com/s/files/1/0453/8567/9016/files/to_be_present_simple_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8551/files/57778924227.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1400/files/life_bucket_list_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/2265/4362/files/45384683836.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/jokijajitifazuzogitilokit.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5174/files/jagamifapekuwub.pdf
    • https://cdn.shopify.com/s/files/1/0431/0443/6390/files/116405919.pdf
    • https://cdn.shopify.com/s/files/1/0437/1798/4405/files/transformers_to_punish_and_enslave_window_decal.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/38074108575.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_off00004d70.bin
e823007e5dc15e3da8d28eb82f9db19f8c3774854f8be9d220ada73ee0a7e23e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D70 5212 bytes
font_01_sfnt_off00005f1d.bin
74fb12c6b1aeffe7d0a7d5ea8c159e74d373cd1597e40f2ead8cc8897cb98de1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1D 10296 bytes

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