Malicious PDF — malware analysis report

Static analysis result for SHA-256 adae2fa939a30a90…

MALICIOUS

PDF

49.8 KB Created: 2020-08-12 01:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 870a4686e69ddce6826273593f6beb11 SHA-1: d2408da6dd073d5050fd3e0ed16d1bb1d69731dd SHA-256: adae2fa939a30a90455dda5e76cb92d55a637d9546b37a1c9edf0583285b6b52
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL is https://ttraff.cc/pify?keyword=kelas+amphineura+pdf, which likely leads to a further malicious resource. The document body is heavily obfuscated but contains references to the redirector URL and other PDF files hosted on Shopify. The presence of numerous links suggests a phishing or scam attempt.

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=kelas+amphineura+pdf
    • http://files.dizzycoach.com/uploads/1/3/1/1/131163832/tilugaworid_lagigamujejugeb_mavem_wesomasuji.pdf
    • http://files.nickcutroneo.com/uploads/1/3/1/0/131071137/nozuje.pdf
    • http://binosaz.msmw.com/uploads/1/3/1/4/131453934/8493047.pdf
    • https://cdn.shopify.com/s/files/1/0428/3065/9750/files/66385674068.pdf
    • https://cdn.shopify.com/s/files/1/0447/9628/0993/files/adobe_editor_full.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/75726925252.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7557/files/ban_this_book_alan_gratz.pdf
    • https://cdn.shopify.com/s/files/1/0444/0273/7318/files/german_a2_formal_letter_writing_samples.pdf
    • https://cdn.shopify.com/s/files/1/0440/6129/4757/files/91255363625.pdf
    • https://cdn.shopify.com/s/files/1/0435/4090/6135/files/corporate_computer_security.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/60546378782.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/79669500148.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_off000086b1.bin
1f03135208467506fd32b4b7f8b225cc693a9b1384c33128093a4fde12595df6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86B1 5248 bytes
font_01_sfnt_off00009862.bin
ac9e6a16e07cca737c024b408768899956a10ed36937c57bf6cb255353c2d27d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9862 9852 bytes

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