Malicious PDF — malware analysis report

Static analysis result for SHA-256 929aba54dabfee11…

MALICIOUS

PDF

36.0 KB Created: 2020-08-03 23:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ce86b21cb164677dabb35a6a496a47b SHA-1: 3a57b5a1945c109067ad06fe53744fbceb2f7bd7 SHA-256: 929aba54dabfee1146b7afcd619ed49977f66612426391b406e6bfc5efd426df
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=autumn+leaves+partitura+sax+alto+pdf'. Additionally, it exhibits a PDF link farm behavior, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. This suggests a social engineering attack aiming to trick the user into visiting a malicious site.

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+partitura+sax+alto+pdf
    • http://files.leedstriathloncentre.co.uk/uploads/1/3/0/7/130776632/tabepadusesalonu.pdf
    • http://files.adultedresources.com/uploads/1/3/1/6/131606127/9b158.pdf
    • http://files.readingsonrace.com/uploads/1/3/1/1/131163737/1486591.pdf
    • http://files.unitetheminds.com/uploads/1/3/0/7/130775357/jewabunerinazonufop.pdf
    • http://files.easel-lab-mondal.com/uploads/1/3/1/3/131378780/6618228.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonub.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7398/files/terra_tech_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/1157/0838/files/wugozikipod.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/vugodumuretulitazuwu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/31893314827.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/memezusisiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xakisone.pdf
    • https://cdn.shopify.com/s/files/1/0439/1141/3912/files/60724673695.pdf
    • https://cdn.shopify.com/s/files/1/0431/8088/4129/files/vigakofavojazi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/veriliwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0781/1482/files/92572098385.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/youtube_on_repeat.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/mamikinovewezotakevaxej.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_off00004db6.bin
f51c98795c655a29dfbd5288216f30c7e823c3a565fcd55e8331f8b8116e9e8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB6 5304 bytes
font_01_sfnt_off00005fb3.bin
a8c80a5fa08e74a46929fc4276aefefbb038e313dc7716a8919c8e2046b83dd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB3 9728 bytes

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