Malicious PDF — malware analysis report

Static analysis result for SHA-256 debe670cde7583e6…

MALICIOUS

PDF

40.4 KB Created: 2020-08-21 21:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87b4334c017506b850f44053b27db0e4 SHA-1: b7757a0eeb6bf285fe7557f7c3d761f1fce42e35 SHA-256: debe670cde7583e6c93aa82129f087d5d2671a8992e637814e874352ab356cf8
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link and a link farm. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'facebook business cover template'. This suggests a social engineering attack aimed at tricking users into clicking malicious links. The primary malicious IOC is the redirector URL.

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.ru/pify?keyword=facebook+business+cover+template+psd
    • http://files.rollinakersfarm.com/uploads/1/3/1/3/131383838/c55d73d856af2e.pdf
    • http://files.buddymasonhoops.com/uploads/1/3/1/4/131453459/4435149.pdf
    • https://cdn.shopify.com/s/files/1/0431/7940/9568/files/bsc_inorganic_chemistry_practical_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/54823544912.pdf
    • https://cdn.shopify.com/s/files/1/0441/0392/5912/files/ir_functional_group_table.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/tecnologia_con_enfasis_en_informatica.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3630/files/27265419202.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/autumn_leaves_jazz_standard_piano.pdf
    • https://cdn.shopify.com/s/files/1/0440/4301/0198/files/jelasezexavakobikosedoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/5661/7877/files/cash_book_class_11_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/gawesa.pdf
    • https://cdn.shopify.com/s/files/1/0460/1289/1297/files/comprehension_exercises_for_class_7_with_answers.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_off000058b7.bin
dfc7a74ffff467fdddcc49a0fcd01f5ae9df868ca895104c0b7f08e8b21893d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B7 5436 bytes
font_01_sfnt_off00006b1a.bin
a18f70f734bcf91cc6be565056331a0058a975b592d47b111cbef4c06377ec9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1A 13448 bytes

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