Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc55649556fb12d5…

MALICIOUS

PDF

41.2 KB Created: 2020-08-25 00:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84253db7d9b8655b2d894f9d14400c21 SHA-1: dc06ca20c7504d62ce8bfbe0fc5e5ee4f67971cb SHA-256: fc55649556fb12d5f005a74988a8d00d79562c59b03791210921fbe15b8af238
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.com/pify?keyword=frp+bypass+apk+samsung++2018', is designed to lure users by promising information on FRP bypass for Samsung devices. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the malicious redirector. The primary intent appears to be directing users to malicious infrastructure via the ttraff.com 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.com/pify?keyword=frp+bypass+apk+samsung++2018
    • http://kowudi.ashleyinanutshell.com/uploads/1/3/1/4/131453574/getizevebi.pdf
    • http://revexuxa.mikericesports.com/uploads/1/3/0/8/130814237/d1c88213ba.pdf
    • http://files.psychotherapistsdatabase.com/uploads/1/3/1/0/131070938/9e7bc.pdf
    • http://wudufane.oldscrollshop.com/uploads/1/3/2/8/132814097/8619006.pdf
    • http://wofox.sedgleyplace.com/uploads/1/3/1/8/131856772/xotisajet.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/alphabet_cursive_handwriting_worksheets_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/2953/4632/files/daxakubivegarawitu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/youtube_video_format.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/center_for_humane_technology_design_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/vibewiwoju.pdf
    • https://cdn.shopify.com/s/files/1/0435/0479/5800/files/76386037323.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/68272711946.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/apache_spark_quick_start_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6376/files/birenojaruxoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6975/8874/files/noxiximosafibitigeru.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6327/files/654428358.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_off0000613b.bin
ac397e20ba0c985f78e4a3b0e35300ae6f8c6072d038742c7b17d8458d71384e
pdf-font-stream PDF embedded font (sfnt) at offset 0x613B 5888 bytes
font_01_sfnt_off00007539.bin
a9901dbcdb246db646847572a86fc798a8855eedb85afa7255050b565ada90c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7539 10128 bytes