Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a9f2de782eec00…

MALICIOUS

PDF

39.8 KB Created: 2020-08-19 17:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 837ef0e942e0f7eaf0aeb2066c16e8de SHA-1: c9e6c2a26c674619d94a50921ad38e0fe62dac23 SHA-256: 32a9f2de782eec009a2e4403bf603e91787ff80875f735367f5caa0e6a595ca4
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=assistive+touch+mod+apk+no+ads'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, a heuristic for a PDF link farm was triggered, with multiple external PDF links embedded, including one hosted on cdn.shopify.com. The document body contains obfuscated text but prominently features the malicious 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.cc/pify?keyword=assistive+touch+mod+apk+no+ads
    • http://kalewuf.valleyvintageshop.com/uploads/1/3/1/3/131380349/xefovesebujuk.pdf
    • http://files.5809yoga.com/uploads/1/3/1/4/131437669/kezivifa.pdf
    • http://files.motheongprimaryschool.com/uploads/1/3/1/3/131383743/70a0338218a23c0.pdf
    • http://files.maggiebathory.com/uploads/1/3/0/7/130776075/vumumizof.pdf
    • https://cdn.shopify.com/s/files/1/0429/8289/9871/files/83267941135.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2821/files/96017618422.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/wokevol.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/16446468742.pdf
    • https://cdn.shopify.com/s/files/1/0439/2511/0952/files/ataxia_telangiectasia_review.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/luvuvonuxatovosi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7029/9048/files/branded_formal_shoes_online_sale.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/calabozos_y_dragones_3._5.pdf
    • https://cdn.shopify.com/s/files/1/0461/7699/3434/files/70845307123.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_off00005f24.bin
602ad7baa13a8074b9b4a9f15d2d4db08b27ad6e82e0e58935c646455058ccf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F24 5296 bytes
font_01_sfnt_off0000710e.bin
9f8f63d02fa4db2627dda501488779eb92f3c759db0d67246130d67201a61d71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710E 9856 bytes

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