Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14d1b2062754a1e…

MALICIOUS

PDF

34.6 KB Created: 2020-08-16 18:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5e868331ab717aae2e676706e454d9a SHA-1: d593c8292ed22362d62e90703fda5e49ccd568b1 SHA-256: a14d1b2062754a1eb674f64450bf552ff02b12b1abd39ca5872f9a3e771c673e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, characteristic of a link farm, with one of these links directing to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The primary malicious indicator is the redirector URL, suggesting a phishing or malware distribution attempt.

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=aah+aah+sound+ringtone
    • http://files.cchsguidance.com/uploads/1/3/2/6/132681725/fibigofefoke.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4020/files/sitosamiwunulur.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/59265577169.pdf
    • https://cdn.shopify.com/s/files/1/0435/3225/5392/files/43672616375.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/53643628703.pdf
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/gmail_encrypted_email.pdf
    • https://cdn.shopify.com/s/files/1/0437/8945/1425/files/41480804614.pdf
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/regex_golf_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/2480/9116/files/awaken_the_giant_within_you_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6438/4927/files/rodiwebepavetutenusa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/concepts_of_c_programming.pdf
    • https://cdn.shopify.com/s/files/1/0430/2854/5693/files/14860062657.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/95028458482.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_off000047b8.bin
e90fa414cf004aa74a442f4fcf81cbf489255fdd914e9054acea7b69c153af68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47B8 5044 bytes
font_01_sfnt_off000058d1.bin
6fa556535926974392c66925437ffab084fe9a66f7237f1a138fa5cd32105789		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58D1 11580 bytes

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