Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8440c2d264e424…

MALICIOUS

PDF

34.7 KB Created: 2020-08-17 02:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d8ee3602be2bb5a0f4452cb7d227ea7 SHA-1: 99f9f8f1e9994e4e23c0b41addc1e55613592687 SHA-256: 4f8440c2d264e4241e30719f0f7802f508e90aa4e871968a1e2b969f9b904463
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though garbled, contains text related to 'Autumn leaves piano sheet music', suggesting a lure to disguise the malicious intent. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a phishing page or malware download.

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=autumn+leaves+piano+sheet+music+eva+cassidy
    • http://files.stmarks-benson.com/uploads/1/3/1/6/131636866/7e15335.pdf
    • http://files.tigerunstrong.com/uploads/1/3/1/4/131453456/6982004.pdf
    • http://files.sunsolutionsolar.com/uploads/1/3/1/6/131637896/930774e95.pdf
    • https://cdn.shopify.com/s/files/1/0433/2732/4310/files/52002546558.pdf
    • https://cdn.shopify.com/s/files/1/0437/4704/9621/files/hp_elitedesk_800_g1_driver.pdf
    • https://cdn.shopify.com/s/files/1/0431/9284/4448/files/woxuzaromijoxaxelufunix.pdf
    • https://cdn.shopify.com/s/files/1/0435/7029/9048/files/el_ser_humano_como_ser_biopsicosocial.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4565/files/14864436974.pdf
    • https://cdn.shopify.com/s/files/1/0432/1561/8215/files/gofagidutilajokuro.pdf
    • https://cdn.shopify.com/s/files/1/0444/8750/8135/files/all_android_mobile_secret_codes.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/80298716354.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/56245830174.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/telugu_movies_free_2018_utorrent.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/bar_billiards_game.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/38511910091.pdf
    • https://cdn.shopify.com/s/files/1/0450/6284/8664/files/fibipofibabe.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_off000049b7.bin
d8e23956c2b2a1a16a6142d61b5315faf9a5969b72ba9d77a197081457cea275		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49B7 5368 bytes
font_01_sfnt_off00005bdb.bin
aa3b23fb2521992b566f1b494ea7a7dce5d247c30507b3646bf320c12b0a6abb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDB 9824 bytes

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