Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f1e350edf15c5d3…

MALICIOUS

PDF

34.6 KB Created: 2020-08-21 19:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbaacbc7f9799f6936213b1ef970c3ef SHA-1: 250cd88397bd0e7a8885d1d64ce0e2f33ee595b5 SHA-256: 3f1e350edf15c5d359b4065857e068da30964b85fb3df62856b6f4c5c2200eb9
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, many of which point to external resources. One critical heuristic identified a malicious redirector link, suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, contains text related to nutritional information and includes the malicious URL, likely a lure to entice users to click. The presence of a link farm and a malicious redirector indicates a probable phishing or content redirection attack.

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.cc/pify?keyword=grilled+breakfast+burrito+nutrition+information
    • http://files.aimeewalker.co.nz/uploads/1/3/0/9/130969761/d3ebd066cfa02.pdf
    • http://files.elgintreepros.com/uploads/1/3/1/6/131636843/8166930.pdf
    • https://cdn.shopify.com/s/files/1/0439/3756/2779/files/agresti_analysis_of_ordinal_categorical_data.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/88895315386.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7255/files/bomokinigumonazefi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/gunifiduvobedoxag.pdf
    • https://cdn.shopify.com/s/files/1/0427/7554/3964/files/87477111789.pdf
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/duvozoni.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4980/files/minecraft_net_download_jsp.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/somuluw.pdf
    • https://cdn.shopify.com/s/files/1/0438/0993/1426/files/kunoxinolirowolofuwaf.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_off0000492f.bin
a274239498f7d0375bbc7344b5b62ea3676a7f3f4d2e7b581b2623d57d97889b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x492F 5288 bytes
font_01_sfnt_off00005b14.bin
b73328dcc5abea287d82fd9517b9c7427838c927c5d03fc6d9c933f914d4ab85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B14 10176 bytes

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