Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb6e7648ca0892a…

MALICIOUS

PDF

46.8 KB Created: 2020-08-21 05:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5332594f5cbe30c66e37a7f0ea38889f SHA-1: c61ddae5cbdf5c7d3417b6128d6e15cd482d61c1 SHA-256: 3eb6e7648ca0892a9970fb48c52dcd15dd7cdb9ec22f96e7805a0c371b9075e1
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Ccleaner professional for pc' and a URL that appears to be a lure. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports the interpretation that this document is designed to trick users into downloading content. The primary malicious URL identified is https://ttraff.cc/pify?keyword=ccleaner+professional+for+pc.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ccleaner+professional+for+pc
    • http://files.nahnkc.com/uploads/1/3/0/7/130776821/40c044857c2d875.pdf
    • http://files.kamifitness.com/uploads/1/3/2/6/132695258/5ca4e.pdf
    • http://vuxefuj.myenchantedlocket.com/uploads/1/3/1/6/131606349/3191c36f90d0d8.pdf
    • http://files.valleybookstore.com/uploads/1/3/1/3/131380337/392d360.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5519/files/95421314038.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/vascular_plants.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/wubupotebariwukimolim.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3931/files/survey_questions_answerable_by_yes_or_no.pdf
    • https://cdn.shopify.com/s/files/1/0428/4245/6231/files/ischemic_heart_disease_journal.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9292/files/biological_diversity_act_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/2308/8290/files/93750691094.pdf
    • https://cdn.shopify.com/s/files/1/0428/4701/0972/files/c_h_spurgeon_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/2764/5084/files/ikea_bed_sheet_size_guide.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_off000077d1.bin
9cba97d29f3c9daee67354c71477fc2c56574a98b135b4740b25c88d03bf4439		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D1 4916 bytes
font_01_sfnt_off00008888.bin
a7b999e589906036147055325750da2b3ec68a4dfa68e996b90daca54c3fedb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8888 13052 bytes

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