Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74cfa2fb937c56d…

MALICIOUS

PDF

41.6 KB Created: 2020-08-12 08:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab459fa552825511a09587f42cab7a25 SHA-1: 82be50414d182e7b8c6e6bc206f17452efd58b4a SHA-256: a74cfa2fb937c56d9c549c0f01d10efe82d138b3208c898808b731260a2330c3
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a lure to a malicious site, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=carnatic+music+classes+pdf', reinforcing the malicious redirector heuristic. No scripts were extracted from this sample.

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.com/pify?keyword=carnatic+music+classes+pdf
    • http://files.lebanontrailptsa.com/uploads/1/3/1/8/131856815/fevibakujoreja-nunena.pdf
    • http://kerexurin.gravelleybridgecpc.com/uploads/1/3/1/4/131407469/6607123.pdf
    • http://files.khairullahrahim.com/uploads/1/3/1/0/131069968/posawazagi-vozijaxobole-vojefufitujivek-bovuvij.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/goxixaxid.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/prism_spectrometer_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/43735848093.pdf
    • https://cdn.shopify.com/s/files/1/0432/3531/1775/files/pijige.pdf
    • https://cdn.shopify.com/s/files/1/0433/8139/1514/files/18332895423.pdf
    • https://cdn.shopify.com/s/files/1/0435/2419/4468/files/jafokaxowikow.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/factoring_polynomials_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8514/files/60800654937.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/12180868441.pdf
    • https://cdn.shopify.com/s/files/1/0434/1039/1207/files/san_diego_zip_code_naval_base.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/movikulewerudazuxedo.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_off000064c8.bin
64b1934db3c83341cfb8f658faafca94304360ed408ac327816924af354d00af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C8 5208 bytes
font_01_sfnt_off0000765e.bin
5ab1f5a9f1bb3c5365a9cff90c9fb16e492999a1eb0d21b6a589e11c958866ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765E 10352 bytes

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