Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c2901867549e32…

MALICIOUS

PDF

40.5 KB Created: 2020-08-20 20:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98bb2b5065a304399816fc3fe67e9cef SHA-1: b748803780f6377c437c21bc8ff2e7c940000776 SHA-256: a2c2901867549e32d6880bc60503274c992efce6a81a554df49901a1f79a61b1
150 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it's a redirector link. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a malicious redirector. The PDF also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to distribute 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.com/pify?keyword=anatomical+terms+positions+worksheet
    • http://files.wolfespringfarm.com/uploads/1/3/0/8/130814459/vawazo.pdf
    • http://kagexi.jolttherapytool.com/uploads/1/3/1/4/131454057/lulibilolebav-fisaba-koferuzixeviji-noxunut.pdf
    • http://vunereg.amreetakaur.com/uploads/1/3/1/0/131070805/e244475f3297b83.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6564/files/juvisamuribebena.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/85822930505.pdf
    • https://cdn.shopify.com/s/files/1/0444/4625/3222/files/hindu_baby_girl_names_starting_with_m.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2892/files/14214912628.pdf
    • https://cdn.shopify.com/s/files/1/0439/9028/6494/files/56088229295.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/bulozimodijovomujuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4566/files/61497729768.pdf
    • https://cdn.shopify.com/s/files/1/0440/8918/0310/files/watch_john_carter_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/4288/0160/files/in_the_summertime_chords.pdf
    • https://cdn.shopify.com/s/files/1/0434/6498/2693/files/78255902529.pdf
    • https://cdn.shopify.com/s/files/1/0434/2713/5640/files/spiritual_meaning_of_months_of_the_year.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_off00006083.bin
6b49577901deccd6060e689b2c92d737d0ef5d5e3debbbc19c01a26e6b076ad7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6083 5320 bytes
font_01_sfnt_off00007276.bin
2293bf9736071673acb00a0ddbdcb3f924e7258c1f4748e987c90276539f1203		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7276 10308 bytes

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