Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9a236770099121…

MALICIOUS

PDF

59.2 KB Created: 2020-08-14 21:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3ec7ba3d2ef1ff0af0cf027cfa2c3a6 SHA-1: 52ba0b78d3564abc582dc0e34bc1d5132a85de17 SHA-256: ea9a236770099121c66acc6901d86f87d4f05a20edad859567e206983f0e9f14
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector at `ttraff.com`. The heuristic `PDF_MALICIOUS_REDIRECTOR_LINK` confirms this, indicating the document's primary purpose is to lure users to malicious sites. The `ML_NYX_PDF_MALICIOUS` classifier also strongly supports this assessment. No scripts were extracted, but the presence of a link farm suggests a broad phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wb?keyword=cubic%20spline%20interpolation%20example%20pdf
    • http://files.yez.dk/uploads/1/3/2/8/132815343/513965.pdf
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/webevefudarapenutetepejet.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/botajunosaridugopaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8342/files/dikazibed.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/92580168906.pdf
    • https://cdn.shopify.com/s/files/1/0437/2260/4695/files/types_of_chemical_bonds_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/2856/0547/files/marketing_activities_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/kundalini_yoga_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0432/9105/0137/files/knight_movement_chess.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/83012909899.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/discharge_against_medical_advice_form_sample.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006533.bin
d33cf840ff3ff0766d9c80d93e16118081c76e59e0ad9044f1e7c4bd8ad1b5bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6533 6088 bytes
font_01_sfnt_off000079ee.bin
d7beb1324c249253debc72ded3505ea8b2b8cb3dda9f87f041fa77aa6b2c9e70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79EE 5416 bytes
font_02_sfnt_off00008c34.bin
5b3840835bf2c37f97345514cc06403d51fb409de6660c4515d6c3f0f4f539af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C34 15244 bytes
font_03_sfnt_off0000bb54.bin
dd71eae22a699c9ac025133da1bc9f396df8cbb3742e99dd568ae4aa6386c39c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB54 16308 bytes
font_04_sfnt_off0000d0de.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DE 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.