Malicious PDF — malware analysis report

Static analysis result for SHA-256 367bea6ddd35fee5…

MALICIOUS

PDF

41.7 KB Created: 2020-08-07 18:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1d016ad7f49bfef60b5452caa125e59 SHA-1: dc84fc59d512e7bc721d76495bf93b16fddea080 SHA-256: 367bea6ddd35fee5b3e33ac714c33df082d8cb967073081e57e620c7c35854e5
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 firing indicates that the PDF links to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a title related to a 'generador electrico eolico casero pdf', suggesting a lure to a scam or phishing page. The ML classifier also strongly flagged this PDF as malicious.

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=generador+electrico+eolico+casero+pdf
    • http://files.laceyscatering.com/uploads/1/3/1/4/131406337/24f36.pdf
    • http://files.loveharmonyrecords.com/uploads/1/3/1/6/131636676/56764e373b.pdf
    • http://files.roblonsinger.com/uploads/1/3/2/6/132695828/430710.pdf
    • http://files.hawaiiafterschoolalliance.org/uploads/1/3/1/6/131606343/2280863.pdf
    • http://files.blueridgebarassociation.com/uploads/1/3/0/7/130740624/pimirogudiku-wuwivedazebev-wigiguvi-ragafunuxotaweb.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2481/files/wojurinuri.pdf
    • https://cdn.shopify.com/s/files/1/0429/9315/6259/files/58231593933.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/ocean_of_apk.pdf
    • https://cdn.shopify.com/s/files/1/0439/7072/3998/files/vuvuvut.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/55061941071.pdf
    • https://cdn.shopify.com/s/files/1/0435/4100/4439/files/bukiroreroxavisanogaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3929/files/bukolimojebenixugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2730/files/60910123189.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/physics_principles_and_problems.pdf
    • https://cdn.shopify.com/s/files/1/0432/9711/2219/files/gilupajijobak.pdf
    • https://cdn.shopify.com/s/files/1/0435/5981/3279/files/nuzowoke.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_off000062d1.bin
fed7de4804837959f498b8a9efc3d719e3eb8cd26f7c84ffb638937eaff66365		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D1 5180 bytes
font_01_sfnt_off00007481.bin
6600af82f06e2cab8225fdc63ed0368394bd698d78883a5f7d439014c0947cae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7481 10956 bytes

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