Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c35a96f8929de8…

MALICIOUS

PDF

52.3 KB Created: 2020-08-25 05:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3aeb93750aefa1c427adbcbb1940238 SHA-1: 3f686b0d3c4f16c257aa768363a0f1d1fd57cf6a SHA-256: e2c35a96f8929de8e7d4b62e93d4f740f445f603b3801280c719be3a150deee5
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=procedure+guidelines+for+myocardial+perfusion+imaging'. This URL, combined with the PDF SEO link farm heuristic, indicates a likely attempt to direct users to malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent.

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=procedure+guidelines+for+myocardial+perfusion+imaging
    • http://files.dewumine.com/uploads/1/3/1/4/131407492/bebujuko.pdf
    • https://cdn.shopify.com/s/files/1/0436/0850/6531/files/carto_de_vacinao_para_cachorro.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/76050097076.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3437/files/spider_man_3_ppsspp_android_gameplay.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4882/files/catholic_youth_bible_third_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/3924/3931/files/pusikopejojibatojejogaw.pdf
    • https://cdn.shopify.com/s/files/1/0439/2937/0779/files/botines_plataforma_xl.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/smoothie_recipe_for_weight_loss.pdf
    • https://cdn.shopify.com/s/files/1/0434/0577/0909/files/mukobokap.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/80115281767.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pafinekumukomotutawewokab.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3934/files/sciatica_exercises_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/hillbilly_elegy_free_download.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_off00008356.bin
b14ae07da5e385831c16bb79181ae4b529a6c3496a4bedfba545457d962ed0c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8356 5576 bytes
font_01_sfnt_off0000963a.bin
fd0997ffb21d73bc3a21ac65dabfc7d1f690f72f38a09334b400be967190dd6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x963A 14544 bytes

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