Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f5c9b8b8df0bc62…

MALICIOUS

PDF

46.0 KB Created: 2020-08-12 11:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 627bdc6a242903ec2aec7159f6815a68 SHA-1: 8f238a71af6755b7751a8356ff9b8ceaf5d609cd SHA-256: 9f5c9b8b8df0bc6225ef5aa7c34954ef55463c6291603bdaab8d6f99ffc5e887
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 one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=is+11513+pdf+download, which is likely used to redirect the user to a malicious payload. The presence of numerous links to various domains, including many on cdn.shopify.com, suggests a tactic to distribute malicious content through a large number of seemingly benign, yet controlled, landing pages.

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=is+11513+pdf+download
    • http://sirolabar.madinaahadi.com/uploads/1/3/1/4/131438641/4814390.pdf
    • http://files.wao-lb.com/uploads/1/3/1/1/131163959/wibakidixirifebones.pdf
    • http://files.mushroomsnaturallystl.com/uploads/1/3/1/4/131453598/6636089.pdf
    • http://filoxol.webelievefightals.com/uploads/1/3/2/3/132303382/728c847f2e837.pdf
    • http://files.firstbaptistnorfolk.org/uploads/1/3/1/3/131379290/9659050.pdf
    • https://cdn.shopify.com/s/files/1/0430/3421/4561/files/feretugawumala.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdf
    • https://cdn.shopify.com/s/files/1/0434/4646/8769/files/kemuvavukisapuzepe.pdf
    • https://cdn.shopify.com/s/files/1/0438/3775/1453/files/zogag.pdf
    • https://cdn.shopify.com/s/files/1/0437/6353/1933/files/71772230092.pdf
    • https://cdn.shopify.com/s/files/1/0439/2773/2379/files/vubugarugugonero.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/jinevexizog.pdf
    • https://cdn.shopify.com/s/files/1/0434/9083/6632/files/11985487377.pdf
    • https://cdn.shopify.com/s/files/1/0432/0621/3789/files/bemime.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/koxotupu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4157/0466/files/24518523225.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_off000076ca.bin
d39afb8772a99e1db210c9760436af37661384bccd292df6bc765c085023d074		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76CA 5308 bytes
font_01_sfnt_off00008907.bin
e3ee667cca1064d49225a7bd5ace5390436e66354d4950595f29b66566373921		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8907 10104 bytes

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