Malicious PDF — malware analysis report

Static analysis result for SHA-256 99275525a11f7644…

MALICIOUS

PDF

45.5 KB Created: 2020-08-04 15:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e5603abe5c5ecb2ae48015f00e4b810 SHA-1: 3dc4db0c55d98368e395da51262ab49450feaeec SHA-256: 99275525a11f7644b77dca9b236d8a1dee6900eccfd82cd4f5badb5ff6b53cc2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, includes text suggesting a lure for a 'black s law dictionary 10th edition free pdf download'. The primary malicious IOC is the ttraff.com redirector, which likely leads to further malicious content. The presence of many Shopify links suggests an attempt to blend in with legitimate content while distributing the malicious lure.

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.com/pify?keyword=black+s+law+dictionary+10th+edition+free+pdf+download
    • http://files.abivaonlineresources.com/uploads/1/3/2/7/132712508/gekizugomazosuw.pdf
    • http://files.alaskazooarch.org/uploads/1/3/1/4/131453402/badesenudasad.pdf
    • http://files.shelbydeep.com/uploads/1/3/2/6/132696210/mowarega_lugifezusite_vazorokogivavi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/35443062792.pdf
    • https://cdn.shopify.com/s/files/1/0430/2697/2825/files/livojixuwajux.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7816/files/6083812408.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/calculation_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/85175339291.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/96156633845.pdf
    • https://cdn.shopify.com/s/files/1/0429/2529/3724/files/sugib.pdf
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/20701660184.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8949/files/29685216137.pdf
    • https://cdn.shopify.com/s/files/1/0431/7347/8560/files/29808515371.pdf
    • https://cdn.shopify.com/s/files/1/0431/8933/8276/files/gugininasisub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/27213660472.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6066/files/78654829668.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000587b.bin
964c086ae94fbe086f8e1992719d5da14bd5b2b9b1e844422e751a4b1b170791
pdf-font-stream PDF embedded font (sfnt) at offset 0x587B 5744 bytes
font_01_sfnt_off00006c28.bin
08e1fecb827e9c88da0eed63a2d67380c3e37a297f4b73cef0bde07351bdff91
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C28 10956 bytes
font_02_sfnt_off000090aa.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x90AA 16312 bytes