Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd122d72a5059eea…

MALICIOUS

PDF

42.0 KB Created: 2020-09-20 05:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0083dcd9ec3ded92fbef7b70196f2123 SHA-1: 881fc812def3617194785df40358d03b95cf7a06 SHA-256: dd122d72a5059eea5dfb26fa8dd614c5a7fb2e82f025694652d4bc6b3ae227f5
150 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, specifically pointing to 'https://ttraff.me/pify?keyword=mr+hui%2527s+no+2+phone+number'. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a link farm or redirection tactic. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to a malicious site via a deceptive link.

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.me/pify?keyword=mr+hui%2527s+no+2+phone+number
    • http://gatebo.hunting-toolbox.com/uploads/1/3/1/4/131437490/1454183.pdf
    • http://jinop.rceslibrary.com/uploads/1/3/2/3/132303382/nuforadelij-dajijuledorino.pdf
    • http://lomebiloz.ayusewingproject.org/uploads/1/3/2/6/132682090/3477552.pdf
    • https://1de92c8a-158f-4814-a758-cdbf4a10b3ae.filesusr.com/ugd/0286dd_43fe6c1b76d748ccb492b8f656a51335.pdf?index=true
    • https://f06c6926-af20-43a5-b35f-f1f52f5048a1.filesusr.com/ugd/7cefa9_4f216ded751b444a8778ee0b9abc987c.pdf?index=true
    • https://cf16cc39-e9a8-4845-8efb-4915ed2cebce.filesusr.com/ugd/c57cae_33b89edca8aa4cbeafed36ac2491644a.pdf?index=true
    • https://58db2cc7-533c-47f9-802d-1a6f3db0fe91.filesusr.com/ugd/ee6770_e0c4f1691c974bdb8a48a42080e77723.pdf?index=true
    • https://1554c583-d902-499c-aa0c-fd619280e7c4.filesusr.com/ugd/b371d9_28ab7fc58a5a4471829ca61861493a13.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/gubimogixup.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3537/files/31062443558.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0735/files/81666944160.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/88589831146.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1735/files/89278576820.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/jurnal_hernia_inguinalis.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/79915899064.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_off000047a3.bin
5610602af61a5d41d64642079737f28b203b4cdf55413f671324395aab83dd39
pdf-font-stream PDF embedded font (sfnt) at offset 0x47A3 9756 bytes
font_01_sfnt_off0000678b.bin
bfc8c53b52cd29402dfdc120149a457f2e6aa9e95dd26f18be26d1dcf210ef99
pdf-font-stream PDF embedded font (sfnt) at offset 0x678B 5128 bytes
font_02_sfnt_off000078e1.bin
a3f054c6e7b97641b9b14aaebada39d688fbf08c55755c6d9da11a1f3d015eec
pdf-font-stream PDF embedded font (sfnt) at offset 0x78E1 9996 bytes