Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf2bed4e8af786d…

MALICIOUS

PDF

63.7 KB Created: 2020-08-19 08:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 401c7fd4e9a06bfb97e3bd16b4aac070 SHA-1: ec2733556ee9376421bb2a9b47e41f5b52c90cf2 SHA-256: acf2bed4e8af786d13243c412465dcc962b2a131b1b29cfaa8862e8a5a7ceba7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=scholastic+scope+glossary+of+literary+terms+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, a PDF link farm heuristic was triggered, suggesting a large number of outbound links, with 'https://cdn.shopify.com/s/files/1/0436/9694/7353/files/datux.pdf' being the first identified. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact nature of the lure beyond the malicious link.

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=scholastic+scope+glossary+of+literary+terms+pdf
    • http://files.treetogrow.com/uploads/1/3/0/7/130738720/febojimutute.pdf
    • https://cdn.shopify.com/s/files/1/0436/9694/7353/files/datux.pdf
    • https://cdn.shopify.com/s/files/1/0429/5966/7363/files/iis_url_rewrite.pdf
    • https://cdn.shopify.com/s/files/1/0440/6145/8582/files/analog_and_digital_communication_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/38944687299.pdf
    • https://cdn.shopify.com/s/files/1/0428/8980/5980/files/29098200355.pdf
    • https://cdn.shopify.com/s/files/1/0432/9514/6139/files/13502676065.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2951/files/calendario_lunar_para_siembra_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2501/files/pavukizegekakopa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8822/files/allstays_rv_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/cards_against_humanity_russian.pdf
    • https://cdn.shopify.com/s/files/1/0435/2969/9482/files/cdc_flu_report_2018.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_off0000b38c.bin
fbce7dd5ee7a6c9e7d5864ccb2402a75fed34d140f3505bf2d6e277ba7c6ea14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB38C 5776 bytes
font_01_sfnt_off0000c710.bin
8ae4c7fab5cac8f2423709489196658b4b24660b6d369a78f9c4cb4b6ab08b8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC710 13232 bytes

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