Malicious PDF — malware analysis report

Static analysis result for SHA-256 989e3c0c872f33ad…

MALICIOUS

PDF

41.0 KB Created: 2020-08-02 09:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aff98eeaab27536195a8abcc062c3cfa SHA-1: 1c673655bf24660ac0f5fd4f3cdf943705207923 SHA-256: 989e3c0c872f33addc259dd37aebdc4af94b25a8e6c70399dfb80d81f4cd785b
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external PDF links, indicating a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=the+awakening+cliff+notes. The document body contains garbled text but also includes the same malicious URL, reinforcing its purpose as a lure. The presence of numerous links suggests an attempt to distribute malicious content or phish users.

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=the+awakening+cliff+notes
    • http://files.skincarebyjewls.com/uploads/1/3/0/7/130739073/5535529.pdf
    • http://files.empirewindsandstrings.com/uploads/1/3/2/7/132740541/d667b9b91.pdf
    • http://files.lakemurraymontessori.com/uploads/1/3/0/7/130740420/wureturofevuba_mafakuzi_jusuzinabu.pdf
    • http://files.nmffa.org/uploads/1/3/0/9/130969819/deniz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/17960852246.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/16552736168.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/4725765889.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2315/files/vexorujiwiwebawa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/koxegepodel.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/rakasafefinukowokirasen.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/nba_live_2005.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/27916582404.pdf
    • https://cdn.shopify.com/s/files/1/0440/3652/2149/files/what_is_steam_client_bootstrapper.pdf
    • https://cdn.shopify.com/s/files/1/0440/3675/1525/files/xakagafe.pdf
    • https://cdn.shopify.com/s/files/1/0429/3538/6275/files/69169643555.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_off0000611f.bin
b904adbb7959d12c8d4b022593c453cfca12b442656f448f857d1558367ea5ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x611F 5152 bytes
font_01_sfnt_off000072c4.bin
560b36edc2095312c09bbcfdb10de10a0552b1ce20e93285e05f38d18c3bb51c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C4 10220 bytes

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