Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a24d3520d5d315a…

MALICIOUS

PDF

48.0 KB Created: 2020-08-23 18:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c184ef138fcf060873c9926ea3cce688 SHA-1: c8f96c476c5f9f0063d8223b308544ac90bb0c01 SHA-256: 1a24d3520d5d315aeb7b813cc485b8f9e6704eb6bf25aeb9d1b889970599e2ef
150 Risk Score

Malware Insights

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

The PDF contains a prominent link to a malicious redirector, ttraff.cc, which is designed to lead users to download cracked software. The document body also contains the same lure text and URLs. The ML classifier strongly flagged this PDF as malicious, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a malicious redirector. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation to increase visibility of the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=adobe+audition+cs6+full+crack+gigapurbalingga
    • http://files.susieruthscott.com/uploads/1/3/2/6/132695347/vodinusox-dojefakun-kezevatu-zuzawudixu.pdf
    • http://soburaja.jodynixmusic.com/uploads/1/3/0/8/130814995/8857830.pdf
    • http://files.renaissancedress.com/uploads/1/3/1/8/131871745/nofesubowadixam-tonosu.pdf
    • http://files.abqyav.com/uploads/1/3/1/3/131383949/2015564.pdf
    • http://files.kcrollerwarriors.com/uploads/1/3/0/7/130776409/zimupazibib_bujoku_jidowusenu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3856/2712/files/1370806584.pdf
    • https://cdn.shopify.com/s/files/1/0437/1854/1480/files/mudekav.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/stream_processing_with_apache_flink_o_reilly_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8171/2287/files/4980545054.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/dexizukawologegiso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11383010616.pdf
    • https://cdn.shopify.com/s/files/1/0433/4646/0830/files/befojikedet.pdf
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/xorunugut.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/26526963098.pdf
    • https://cdn.shopify.com/s/files/1/0440/1286/3638/files/algorithm_complexity_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/86491374077.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_off00007137.bin
0a9a48d653b13296b5fec65df18d4c2eeaa933dd3caef5478e8ce4363ef1f9b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7137 5672 bytes
font_01_sfnt_off00008493.bin
3f1c6d2079affd143693d84f0a85f37d73ebd4f106cbd5215354c4ef64235f3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8493 16296 bytes