Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07963e6f7d16485…

MALICIOUS

PDF

61.3 KB Created: 2020-08-22 17:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96befb69ac3f4dac9262aba2ffd5244d SHA-1: 3a3f09efd875079f4c6d3b6eef338ad359c2bd9e SHA-256: f07963e6f7d16485bd1f431e1372ac38a74866e70fbbccff469975ee779b2604
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, pointing to 'https://ttraff.ru/pify?keyword=algebra+word+problems+worksheet+year+9'. The document body, though heavily obfuscated, also contains this URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation. The primary malicious URL is a redirector, suggesting a delivery mechanism for further 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.ru/pify?keyword=algebra+word+problems+worksheet+year+9
    • http://gefofibi.craations.com/uploads/1/3/1/0/131070719/8189765.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/taridulozomoxekolakinuku.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/jasco_remote_codes.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/59792016363.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/86621728010.pdf
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/37671311021.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/xibolabojad.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/gumodapase.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0928/files/95727667376.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/39727091473.pdf
    • https://cdn.shopify.com/s/files/1/0429/2247/5687/files/n_queens_problem_algorithm_using_backtracking.pdf
    • https://cdn.shopify.com/s/files/1/0437/8381/5325/files/nekemuduwuxisuvedodunop.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6058/files/sanigofonune.pdf
    • https://cdn.shopify.com/s/files/1/0437/9167/9639/files/losevawoloto.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6719/files/african_pygmy_hedgehog_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/5536/3734/files/lojiw.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_off0000a05c.bin
a6e0aa1312a808bde37a4e33d1ca8ff5b0dc832ae5e1c201827594f279a86f58
pdf-font-stream PDF embedded font (sfnt) at offset 0xA05C 5552 bytes
font_01_sfnt_off0000b34c.bin
83a25e2e2698e64b27904a08c54bf8b7003f6a71665a273fef62f6927760fcac
pdf-font-stream PDF embedded font (sfnt) at offset 0xB34C 11388 bytes
font_02_sfnt_off0000d9e1.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E1 4324 bytes