Malicious PDF — malware analysis report

Static analysis result for SHA-256 df1f6cc6b90d960d…

MALICIOUS

PDF

41.9 KB Created: 2020-08-18 15:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0397ed119da2ef2c690ab386fcc86d19 SHA-1: d57a1dd801ed5065e453ac3be3ad6d798210f985 SHA-256: df1f6cc6b90d960d52f1e1fe454a89293b7441f96fe1124b6a9d75c06258cea2
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=risk+assessment+plan+template+pdf'. This URL is likely part of a phishing or scam campaign designed to redirect users to malicious content. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The file's structure and embedded links suggest it is part of a link farm designed to improve SEO for malicious content, ultimately leading to the redirector.

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=risk+assessment+plan+template+pdf
    • http://files.annblackburnpoetry.com/uploads/1/3/1/4/131437306/4550509.pdf
    • http://files.coventrypl.org/uploads/1/3/2/6/132696077/fegulepadi-jamazobo-guluw-zogexuf.pdf
    • http://xuzame.thejrsharks.com/uploads/1/3/1/6/131637814/libetekejar.pdf
    • https://cdn.shopify.com/s/files/1/0431/3668/0098/files/audiovisual_translation.pdf
    • https://cdn.shopify.com/s/files/1/0438/6521/1035/files/ruwixofer.pdf
    • https://cdn.shopify.com/s/files/1/0443/8661/5462/files/m777_howitzer_technical_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6726/0582/files/53964608168.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/bisin.pdf
    • https://cdn.shopify.com/s/files/1/0437/8266/8437/files/13553226940.pdf
    • https://cdn.shopify.com/s/files/1/0432/0840/9250/files/antebellum_reform_movements_religion.pdf
    • https://cdn.shopify.com/s/files/1/0440/7430/3640/files/wakeup_on_lan_mac.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/92966269306.pdf
    • https://cdn.shopify.com/s/files/1/0434/7304/3622/files/antiarrhythmic_drugs_classification.pdf
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/34671359986.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2861/files/59756183104.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_off00006702.bin
500dc397dcc18b44ca46bfa8ff93927d35b9058736bf81b38236c6ac8720ef06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6702 5164 bytes
font_01_sfnt_off00007887.bin
e2b8324a46c36d98663b17f9909b8ee8214f84cf12b9119dccb74bd1c4371335		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7887 10156 bytes

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