Malicious PDF — malware analysis report

Static analysis result for SHA-256 51bad976ce29d880…

MALICIOUS

PDF

47.3 KB Created: 2020-08-25 02:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bce1317968f7024dffc19efddb729af SHA-1: 23231480a205ecb11dc581e45939a56efca68c8d SHA-256: 51bad976ce29d8801d3f9d6c7a60bd1e9c53402c74fcc9800f90ad28159591fb
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a high number of embedded links. One of these links, https://ttraff.ru/pify?keyword=scratch+dhan+apk, is identified as a known malicious redirector. The document body also contains this URL, suggesting it is the primary lure. The presence of numerous links, including the malicious redirector, indicates an attempt to lure the user to a compromised or malicious website.

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.ru/pify?keyword=scratch+dhan+apk
    • http://files.grandvoyageitaly.com/uploads/1/3/1/4/131438759/7344799.pdf
    • http://files.tomhelp.us/uploads/1/3/1/4/131453645/0fea2.pdf
    • https://cdn.shopify.com/s/files/1/0433/3325/5323/files/71941580157.pdf
    • https://cdn.shopify.com/s/files/1/0433/9095/9766/files/vshare_helper_windows.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/5990/files/cqc_report_beechwood_nursing_home_scarborough.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/kisuv.pdf
    • https://cdn.shopify.com/s/files/1/0440/8236/4566/files/soduzukitubiveve.pdf
    • https://cdn.shopify.com/s/files/1/0437/7706/5121/files/census_2020_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/burna_boy_burn_identity.pdf
    • https://cdn.shopify.com/s/files/1/0436/6575/2217/files/exclusive_agency_agreement_nsw.pdf
    • https://cdn.shopify.com/s/files/1/0436/5195/6894/files/jogofotobatawafesux.pdf
    • https://cdn.shopify.com/s/files/1/0440/6624/2710/files/zurijojuse.pdf
    • https://cdn.shopify.com/s/files/1/0437/5887/8872/files/dalafumuxafilosazed.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/zudutejerajaximutafaxo.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_off0000659e.bin
22b2c4c81d91f2fc2e918e35cde7a3bcdbce55167b71559cdc986dc3dcac2fbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659E 5116 bytes
font_01_sfnt_off000076f0.bin
597e1fa8c51c8142768d6489ab02d8973ece10792b0be98cdf712a89f24071cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F0 10620 bytes
font_02_sfnt_off00009b7c.bin
c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B7C 16092 bytes

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